We have located Alexander WATSON on the Prince Georges , Maryland census. Alexander was born in 1799 . Where would I find his birth certificate? He must have traveled to Pennsylvania as he married Sidney Derrick,born,March 1824 who was born in Pennsylvania. Thet had seven children: John A. Watson b. 1851 Mary Watson b. 1858 Joseph Watson b. 1860 William Watson b. 1863 Sadie Watson b.(1863-1866) George Watson b. 1866 (1880 census lists George as 14 yrs.of age and a laborer Laura Watson b. 1869 Any information on any member of this family will be greatly appreciated. Thanking you in advance. Ruby Watson Uhazie