Name: Thomas Briscoe
Enlistment Date: 22 Jun 1863
Side Served: Union
State Served: Maryland
Service Record: Enlisted as a Sergeant on 22 June 1863.
Enlisted in Company E, 9th Infantry Regiment Maryland on 22 Jun 1863.
Discharged from Company E, 9th Infantry Regiment Maryland on 25 Apr 1865.
1870 United States Federal Census
Name: Thomas Briscoe
Estimated Birth Year: abt 1834
Age in 1870: 36
Birthplace: Maryland
Home in 1870: Baltimore Ward 17, Baltimore (Independent City), Maryland
Race: White
Gender: Male
Post Office: Baltimore
Household Members: Name Age
Thomas Briscoe 36 Laborer
Sarah Briscoe 26 wife
Mary E Briscoe 3 dau
Martha H Briscoe 3 dau
But I don't know if this is the same William Thomas although I think it likely.
JR