My only reference to Commander Greatorex is from a family tombstone in Banchory, Scotland:
"LOIS LEITH only child of COMMANDER GREATOREX, Royal Navy and granddaughter of Dr McHARDY who died 5th October 1908 at Cranbrook."
Dr James McHardy of Banchory had five daughters and, unless there has been a second marriage, the mother of Lois Greatorex seems to be Alice: Jessie Gordon McHardy (b. 10 Jan 1867; married John Wemyss Syme) Bella Francis McHardy (b. 30 Jul 1868; died young) Jane Kerr McHardy (b. 16 Dec 1869; married John Dunbar) Caroline Anne McHardy (b. 14 Jun 1871; married William Henry Eden Brand) Alice Mary McHardy (b. 10 Sep 1872; no marriage details)