September 20, 1740
An account of the estate of David Dobson dated September 20, 1740, was presented in Prince William County Court on July 26, 1742. The account indicates that Patrick Hamrick junr paid the estate 0.5.0. (Prince William County Will Book C. pp. 364 - 365.)
This is the first apparent record concerning one of Patrick’s children. Evidence confirming Patrick, Jr. as Patrick's son is contained in a 1770 deed which conveys acreage he inherited from his father. (REF: September 6 & 7, 1770) Patrick, Jr. was at least 21 years old or he would not have been able to contract debt to Dobson. (William Waller Hening. Hening’s Statutes At Large, Vol I, 1619 - 1660. Charlottsville, VA: University Press of Virginia, 1969. pp. 269-270.) Therefore, he must have been born no later than 1719. Based on 1710 being the earliest probable marriage date for Patrick, Sr. and Margaret Ingles, (REF: 1710) the earliest date Patrick, Jr. would have been born is 1711.
Tax lists from 1765 reveal that Patrick, Jr. had a son who was also named Patrick. (REF: 1765) Unfortunately, Patrick (III)’s birthdate cannot be pinpointed to a date that is helpful in determining a more precise date for Patrick, Jr.’s birth. Patrick (III) would have had to be at least 16 years old in 1765 to be listed as a tithable, (William Waller Hening. Hening’s Statutes At Large, Vol VI, 1748 - 1755. Charlottsville, VA: University Press of Virginia, 1969. p. 40.) meaning he was born no later than 1749. The only other useful reference toward establishing a birthdate for him is the fact that he made a payment at Daniel Payne’s store in Dumfries, VA on August 23, 1760. (REF: 1759 - 1762) More than likely, he was at least 16 years old at that point in time, implying a birthdate prior to 1744. However, there are no other records that can be used to determine an earlier date. In all likelihood though, Patrick (III) was not born much before 1740; certainly no earlier than 1735—this would make him between 25 and 30 years old when he was living with his father in 1765—any older does not seem reasonable. Using 1744 as his birthdate and assuming that Patrick, Jr. was 25 years old when Patrick (III) was born (which is not an unreasonable assumption), yields a 1719 birthdate for Patrick, Jr.; the same bound already established. Using 1740 as Patrick (III)’s birthdate and making the same assumption as to Patrick, Jr.’s age yields a 1715 birthdate for Patrick, Jr.—in the middle of the established bounds.