+---John Rupert Purchase (09 DEC 1915-06 DEC 1998)
| +---Nelly Janey 
Wayne Purchase
| +---Andrew Stevens
| +---John Wardlow Stevens
| | +---Marianne Campbell
| +---George Frederick Stevens
| | | +---James Riddell (14 NOV 1804-15 FEB 1892)
| | | +---Walter Riddle (ABT AUG 1835-30 MAY 1914)
| | | | | +---Andrew Goodall (-BEF 1869)
| | | | +---Jane Goodall (ABT 1805-09 AUG 1869)
| | | | +---Janet Donaldson
| | +---Jane Riddle (08 NOV 1860-)
| | | +---William Chrichton
| | +---Janet Chrichton (ABT 1840-16 DEC 1875)
+---? Stevens
| +---Robert Porteous
| +---James Bowie Porteous (07 JUN 1842-16 JAN 1923)
| | +---Jane Bowie
+---Eveline Margaret Porteous (1889-1975)
| +---James Riddell (14 NOV 1804-15 FEB 1892)
| +---Walter Riddle (ABT AUG 1835-30 MAY 1914)
| | | +---Andrew Goodall (-BEF 1869)
| | +---Jane Goodall (ABT 1805-09 AUG 1869)
| | +---Janet Donaldson
+---Janet (Jessie) Riddle (09 SEP 1864-1945)
| +---William Chrichton
+---Janet Chrichton (ABT 1840-16 DEC 1875)