She is the daughter of William Hastings Cuthbert and Emily (Cuthbert). She married George Morrison Patrick October 29, 1860 at Kingston (service conducted by Rev. Joseph Elwell of the Apostolic Church).
The Ontario death registration shows her date of death as 9 Oct 1869, which contradicts her headstone and the data on Find a Grave.
The inscription on her headstone reads:
GEORGE MORRISON PATRICK
and [daughter of]
WM HASTINGS CUTHBERT
born Dec 3, 1841
died Oct 3, 1869
aged 27 yrs & 10 mos
She is buried in Cataraqui United Church Cemetery, Kingston, Frontenac, Ontario, Canada (Plot: U 26)
"Ontario, County Marriage Registers, 1858-1869," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2CB-416B : 31 March 2017), George Morrison Patrick and Margaret Cuthbert, 29 Oct 1860; citing Frontenac, Ontario, Canada, Archives of Ontario, Toronto; FHL microfilm 1,030,056.
"Ontario Deaths, 1869-1937 and Overseas Deaths, 1939-1947," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:JN23-MJZ : 11 December 2014), Margaret Elizabeth Patrick, 09 Oct 1869; citing Frontenac, Ontario, page 58 cn 1345, Archives of Ontario, Toronto; FHL microfilm 1,846,464.