Hi Kathie639, I'm not sure if this thread is monitored by any of the participants any more, but I thought I'd reach out and try. I am not positive I can be of help, but for my own family search I've discovered a Land Ownership application dated Nov 23, 1835 in North Elmsley Township, Lanark County Ontario, for one "Willm Minelly" of a 200acre lot.
The part that brings me to post here is that the west half of the same lot, on the same date, is also applied for by one Eligh (believed abbreviation or transcription mistake and could/should be Elizabeth) Kirk.
That lot is definitively owned later by an Andrew Kirk as shown in the local 1851 census, and 1/2 of lot 8 down the road likewise by his twin brother William Kirk, also in 1851. Both were 35 at the time and believed born in Mullinboys (twnshp?), Inver Parish, Donegal Co Ireland in 1816 to a James and Elizabeth Kirk. I believe James died in 1827 and that their last child was born in 1820.
I'm curious, even though the birth date and last name of Elizabeth in your description above would not seem to fit, if there is any connection here? Is it possible Elizabeth was born before 1808 and that Mackey was her maiden name, adopted again perhaps after being widowed when James Kirk died?
Sorry to be so long winded here.
Incidentally, Andrew Kirk died in 1861 in Lanark and William his brother (my direct ancestor), likewise moved to Lambton County sometime between the census mentioned above, and 1861 when he is found in Lambton.
Thanks for your time,
Bob Kirk