+---Herbert Thomas James Signal (23 OCT 1914-)
| +---Mary Elizabeth Shaw 
Herbert Alan Signal (16 MAY 1949-)
| +---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
| +---Stevens (Steve) Riddle (01 JAN 1878-)
| | | +---Andrew Stevens
| | +---Marian Campbell Stevens (04 JUN 1852-16 AUG 1922)
| | +---Marianne Campbell
+---Madge Riddle (1916-)
| +---John Bowman
| +---Constantine Bowman (ABT 1829-16 SEP 1909)
| +---William Bowman (02 DEC 1857-)
| | | +---John Popham
| | +---Ann Popham (ABT 1830-22 JUN 1861)
+---Annie Bowman (1896-)
+---Margaret Muir Fitzgerald (03 NOV 1859-)