Glad to meet you here. I have Sinclairs in London area myself from early 1800's. Actually born there myself. Seem way to busy these days to concentrate; quickly read list items & move on.
Please communicate, did you "London" Sinclairs goon to Lobo Ont or Glencoe area in Middlesex County, Mosa Township, Metcalfe or Ekfrid Township or "towns-villages-corners" named Kilmartin or Walker's Corners. These are all same 10 x 10 mile area; even Lobo is not too far away and there are some indications of interrelationship.
Regards Rick Sinclair
see www.kw.com/sinclair, go to bibliographical page then at end to genealogy page for short history in 1820's to 19xx