Margaret Maria MOLISON, chr 1822 in Fraserburgh ABD was one of the daughters of William Maule MOLISON and his wife Margaret DAVIDSON and thus one of the half-sisters of "our" Allan's maternal gfather, Alexander Strachan MOLISON.
Just for completeness.
There is an LDS submission for the following:
William Adams DAVIDSON married Margaret Maria MOLISON, 27 Mar 1851, Old Machar ABD.
And an extracted record for the following:
Catherine DAVIDSON b 23 Apr 1855, St Cyrus Kincardine, parents William Adam DAVIDSON and Margaret Maria MOLISON.
There is a Will on ScotlandsPeople for Margaret Maria; the Index lists her date and place of death.
Davidson Margaret Maria, 04/09/1889, or Molison, of Balnagask, County of Kincardine, d. 26/06/1889 at Ventnor, Isle of Wight, intestate.
There are several mentions of Balnagask by Boongie Pam on page 51. She mentioned Margaret (DAVIDSON) MOLISON's father Robert as being "of Balnagask". She said that Balnagask House was where Margaret (DAVIDSON) MOLISON (widow of William Maule MOLISON) died in 1877 (and I now note that the informant was M M DAVIDSON, daughter!). And was where James MOLISON died in 1869. She added that Balnagask House is now a care home for the elderly.
JAP
PS: I note that the Scottish Genealogy Society holds the following:
"DAVIDSON 1 LKS.MLN.RFW.DFS 1720-1989 T C 5 pages
Three linked family trees. Letter detailing members of the family of Balnagask."
