A will posted Aug 16, 2016 on Ancestry by melonb10 states:
“1868 Apr. 16 Jackson Co, IN Order of Distribution of Milton’s estate: Estate value $4,267.55 Heirs: Jennet, widow $963.59; all other heirs received $300.36 each: Mary Barns’ heirs (Evan Shewmaker, Rachel Garrett & Milton Barnes); Malinda Hinds, Sally Johnson’s heirs (Henry, Mary and James); Alah Boothe (husband Jeremiah signed for her), Simeon, Braxton, Milton, Colby, Fanny Smallwood and Thomas. Samuel Lee granted letters of authority as Administrator of Milton’s estate (Bk C p497)

Possibly Mary was married again to a Mr. Barns.

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Chestnut Ridge Cemetery Jackson County, Indiana lists Milton Stockdell as b. Oct. 14, 1797 d. Dec 18, 1864 Vet. Co K 8th Ind. Cav.653 (I believe the father’s stone says Civil War info, but I think it was actually the son in the Civil War.)

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Milton Stockdell 8th Regiment, Indiana Cavalry Union, Company K Private M540 Roll 74 August 29, 1861 to September 23, 1864. Report of the Adjutant General of the State of Indiana.

According to the cemetery record it is the father Milton Stockdell who was in the Union army and buried here. This is wrong.

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Milton [Parker] Stockdell in Union 39th Regiment, 8th Indiana Cavalry Company K Private M540 Roll 74. Mustered out at Nashville, TN.

According to the cemetery record it is the father Milton Stockdell who was in the Union army and buried here. This is wrong.

8th Cavalry Regiment Indiana organized Oct 15, 1863, muster date Jul 20, 1865:
Fought on 7 Apr 1862 at Shiloh, TN.
Fought on 31 Dec 1862 at Stones River, TN.
Fought on 30 Jan 1863 at Manchester, TN.
Fought on 19 Jul 1863.
Fought on 11 Sep 1863 at Ringgold, GA.
Fought on 14 Sep 1863.
Fought on 19 Sep 1863 at Chickamauga, GA.
Fought on 20 Sep 1863 at Chickamauga, GA.
Fought on 29 Jul 1864.
Fought on 30 Jul 1864.
Fought on 19 Aug 1864 at Fairburn, GA.
Fought on 19 Aug 1864.
Fought on 20 Aug 1864.
Fought on 28 Aug 1864.
Fought on 31 Aug 1864 at Flint River, GA.
Fought on 5 Sep 1864.
Fought on 7 Sep 1864.
Fought on 10 Sep 1864 at Campbellton, GA.
Fought on 27 Sep 1864 at Pulaski, TN.
Fought on 29 Sep 1864 at Pulaski, TN.
Fought on 28 Nov 1864 at Waynesborough, GA.
Fought on 28 Nov 1864 at Waynesboro, GA.
Fought on 28 Nov 1864.
Fought on 1 Dec 1864 at Lewisville, GA.
Fought on 4 Dec 1864 at Waynesboro, GA.
Fought on 5 Mar 1865 at Fayetteville, NC.
Fought on 7 Mar 1865 at Rockingham, NC.
Fought on 9 Mar 1865 at Rockingham, NC.
Fought on 11 Mar 1865.
Fought on 16 Mar 1865 at Black River, NC.
Fought on 16 Mar 1865 at Averysboro, NC.
Fought on 16 Mar 1865.
Fought on 6 Apr 1865 at Owenburg, NC.

Thirty-ninth Regiment (8th Cavalry). INDIANA (3-YEARS)
Thirty-ninth Regiment (8th Cavalry). Cols., Thomas J. Harrison, Fielder A. Jones; Lieut.-Cols., Fielder A. Jones, 
Thomas Herring; Majs. John D. Evans, Thomas Herring, Thomas Graham, Charles A. Gordon Justus G. Crowell, Thomas N. Baker, John Leavell.

This regiment was organized at Indianapolis and was mustered in on Aug. 29, 1861. It left the state early in September, going into camp at Muldraugh's Hill near Elizabethtown,Ky., and from there moved to Camp Nevin and thence to Camp Wood.
It marched to Nashville with Buell's army; moved to the Tennessee River in the spring; was engaged at Shiloh, where it lost 2 killed and 34 wounded; encamped at Shiloh until the movement was made for Corinth; participated in the siege of that place, and at its conclusion marched through northern Alabama to Nashville, thence to Louisville and through Kentucky in pursuit of Bragg.
It returned to Louisville in November; accompanied Rosecrans' army to Murfreesboro, was heavily engaged at Stone's River, where it lost 31 killed, 118 wounded and 231 missing; and remained in camp near Murfreesboro until the early summer of 1863. In April 1863, the regiment was mounted and served as 1864. mounted infantry during that year.
It reinforced the 2nd Ind. cavalry on the Shelbyvllle road near Murfreesboro in June, in a sharp fight with Wheeler's cavalry; was in skirmishes at Middleton and Liberty gap, and was engaged at Winchester during the movement upon Chattanooga.
It participated in the battle of Chickamauga, and then took part in an expedition into East Tennessee. Authority was given to change the regiment from infantry to cavalry, and Cos. L and M were organized in Sept. 1863, joining the command in the field in October, and the regiment was reorganized Oct. 15, as the 8th Ind. cavalry.
It was engaged on courier duty between Chattanooga and Ringgold during the winter, and reenlisted as a veteran organization, Feb. 22, 1864, being given a furlough in April. 
It participated in Rousseau's raid into Alabama, one battalion of the regiment routing a brigade on the Coosa River, and taking several prisoners.
It also routed the enemy at Chehaw Station, Ala. It took part in McCook's raid around Atlanta, being the only regiment to preserve its organization, and made a charge which routed the enemy and opened the way for the escape of 1,200 of McCook's command.
It was in Kilpatrick s raid into Georgia, leading the charge of the left wing at Lovejoy's Station, riding over Ross' 
division of Confederate cavalry and capturing all his artillery and 4 battleflags. It was also engaged in the 
battle of Jonesboro, at Flint River, and in several skirmishes following the capture of Atlanta.
In the campaigns to Savannah and through the Carolinas, it participated in battles and skirmishes at Waynesboro, Buckhead Church, Brown's Cross-Roads, Reynolds' Plantation, Aiken, Averasboro, Bentonville and Raleigh. At Averasboro it charged and routed Rhett's South Carolina brigade of infantry -- ten times its number -- losing 14 killed and 59 wounded.
A detachment left in Tennessee, fought Wheeler at Franklin and at other points, and was in a severe engagement at Pulaski with Forrest's cavalry. At Savannah, Feb. 20, 1865, the veterans and recruits of the 3d Ind. cavalry were transferred to and consolidated with the 8th. The last battle in North Carolina was fought at Morrisville, where the 8th cavalry whipped Hampton's entire force.
It was on duty in North Carolina, until July 20, 1865, when it was mustered out. The original strength was 1,208; gain by recruits, 902; reenlistments, 305. It lost 56 by desertion: 137 were unaccounted for, and it lost heavily in killed and wounded.

Source: The Union Army, vol. 3 Chickamagua after battle report: 
Report of Col. Thomas J. Harrison, Thirty-ninth Indiana (Mounted) Infantry.
HDQRS. THIRTY-NINTH REGT. INDIANA VOLS.
Chattanooga, September 28, 1863.,
On Thursday evening, 17th instant, I was ordered with my regiment to Bailey's Cross-Roads, in McLemore's Cove, which is opposite gaps were occupied at the time by a strong force of the enemy. About 3 p. m. my
regiment was attacked by a brigade of rebel cavalry at Davis'Ford, on Chickamauga Creek. The fight lasted two hours. The field was left in our possession. We had 2 men slightly wounded; none killed. The enemy had 2
killed, one of whom was Col. Estes, of the Third Confederate Cavalry, and 8 wounded.
On the next day we skirmished at the Widow Davis' Cross-Roads, retaining the ground without loss. The enemy's loss unknown.
On the night of the 18th instant we were ordered to Pond Spring.
On the morning of the 19th, were directed to protect the right and rear of Gen. Sheridan's division. My regiment was delayed in its movements by demonstrations made by the enemy on the La Fayette and Ringgold roads, thereby throwing us in rear of Gen. Mitchell's cavalry. Abut meridian, the enemy attacked our right flank, and succeeded in cutting off the Second Indiana Cavalry, the cavalry train and my regiment from the main body of troops. But after considerable fighting, we drove the enemy and rejoined our army; we reached Crawfish Spring at sunset. I learned that our soldiers on the field were suffering greatly for water. I directed my regiment to press all the canteens that could be found, and, with our own, we were enabled to deliver 1,000 canteens of water by midnight to our suffering soldiers on the battle-field.
On Sunday, the 20th, we were again assigned a position on the extreme right of the infantry. Dismounting, we moved our horses to a secure position in the rear. At 11 a. m. we moved forward, meeting an advancing enemy. Col. Laiboldt's brigade, of Gen. Sheridan's division, was on our left; Col. Wilder's mounted infantry on our right. The enemy met us at the top of a high ridge, and neither party discovered the other until within 30 paces. The struggle was brief, but desperate; yet the enemy was unable to withstand our Spencer rifles, and gave way, running in disorder before both Col. Wilder's and my commands. At the same time Col. Laiboldt's command was driven
back, entirely changing the direction of our line and bringing the enemy directly between us and our army, entirely cutting Col. Wilder and myself off. At that juncture we were ordered to take a train, which was also cut off, and make our way in the direction of Lookout Mountain and thence to Chattanooga, which we did, reaching the neighborhood of Chattanooga at dark.
On the evening of the 21st I was ordered to take position with my regiment on Missionary Hill, 5 miles east of Chattanooga, and to hold the enemy in check as long as I could safely do so. On reaching the ridge I found the
Forty-fourth Indiana and Thirteenth Ohio occupying the same position I was directed to hold. I arranged the three regiments to the best advantage, and on the next morning at 10 o'clock a division of the enemy attacked us.
Company B, commanded by Lieut. Noble; Company C, Capt. Crowell; Company D, Capt. Herring, and Company F, temporarily commanded by Dr. Connett, received and withstood the attack for some time. But I thought it best to draw them back on the reserve line, where the action became general. Lieut.-Col. Aldrich, in command of the Forty-fourth Indiana, made a gallant fight; and I am pleased to call attention to the conduct of Lieut. Norvell, in command of Company H, of my regiment. Late in the evening, the superior force of the enemy, enabling him to outflank us, compelled a retreat; In these engagements we had 5 men killed and 32 wounded. Capt. Potts was
wounded on the 20th, and fell into the hands of the enemy. Lieut.'s Garboden and Clark were both wounded. I was much pleased with the gallant conduct of Maj. J. D. Evans and Adjutant Fortner. Drs. Gray and Connett acquitted themselves with honor in their department. My line officers all discharged their duty in a most commendable manner. My non-commissioned officers and private soldiers were generally prompt and
brave. All of which I respectfully submit.

THOMAS J. HARRISON, Col. Thirty-ninth Indiana Volunteers.
[Brig. Gen. R. W. JOHNSON,]
[Indorsement.]
HDQRS. SECOND DIVISION, TWENTIETH ARMY CORPS, September 29, 1863.
Respectfully forwarded, commending Col. Harrison, his officers, and men, or their good and gallant conduct.
R. W. JOHNSON, Brig.-Gen.
Source: Official Records
PAGE 547-50 KY., SW. VA. TENN., MISS., N. ALA., AND N. GA. [CHAP. XLII. [Series I. Vol. 30. Part I, Reports. Serial No. 50.]