+--Robert Morrison  (ABT 1700-1764)
   +--Alexander Morrison  (1728-7 JUL 1814)
   |  +--Unknown    (Abt. 1700-Bef. 1750)
+--John Morrison  (17 MAR 1775-28 APR 1801)
|  |  +--Christopher Charles Erskine  (1700-19 April 1775)
|  +--Mary Arskins Erskine  (16 FEB 1729/30-UNKNOWN)
|     +--Susanna Robinson  (1713-19 August 1787)
Two Daughters  (-UNKNOWN)
+-- Catherine  (1784-16 APR 1809)