"I still want to know how a 15-year old girl, born in Lower Canada, ended up (apparently alone) in the newly-conquered Cape of Good Hope in late 1796, where she married the egregious Major Shee as he passed through on his way to India!"

Yes - I couldn't agree more. And I'd be interested in her later life - what happened when she and Pulteney Malcolm got home to England - and how she got back to Canada.

The whole thing reads like a highly coloured novel, and would make a great book ... except that I doubt there are the sources (about her, not Pulteney M) to put flesh on the bones, or even to give a complete skeleton.