In Petitions and Land Grants there is the following:
Allan Grant - Land Grant #3804/5 Charlottenburgh
Dougald Grant ditto
Sons of the late John Grant of E ½ Lot 42 North Bank of Raison River 7 Aug 1834
Angus Grant - Land Grant # 4151 Charlottenburgh son of John Grant of Lot 42, North Branch R.R. a deceased UEL 5 Feb 1835
Catherine Grant - Land Grant # 2765 Charlottenburgh D.U.E. spinster daughter of John Grant of E ½ Lot 42, NSRR in said Township a UEL
Catherine Grant - Petition #55 (6th section) Reel: C-2029 Charlottenburgh daughter of John Grant of E ½ Lot 42, NSRR in said Township a UEL 23 Jan 1815. 200 acres
There are two Land Petitions by a Isabella (Cameron) Grant in Charlottenburgh in 1803 and again in 1811. Maybe your Cameron was this Isabella.
There are many petitions for John Grant but no mention of your lot 42.
Mary Grant Land Grant # 3443 Charlottenburgh spinster daughter of John Grant late of E ½ Lot 42, north bank the raison river 18 Jan 1834.