Hello again Ibbotson,
I've had another look at daughter Mary's birth date on 1911 Canadian Census. I said Dec,1910 because it looked like a ditto mark under Dec, (1908) for George's birth on the line above. It's not ditto, it's just a dot. If her birth had been Dec,1910 her age would have been given in months not 1yr. (More on that later) Also, I think George's occupation is Watchmaker, not Watchman. The numbers 6/6/72 (or is it 79?) in section 18, is a code relevant to his occupation but I've never come across double digits in the third part of the number before.
I was curious about the different years given for George Snr. and the rest of the family arriving in Canada so had a look at Outgoing Passenger Lists on Ancestry. This I think is definitely the same family as the 1911 Census. Departure Glasgow, 13th May 1911. Bound for Quebec & Montreal aboard 'Hesperian'. Allan Line. Official No: 124266. Ticket No: 0785. Margt. McIntosh 26 Howife (Housewife). James McIntosh 7. David McIntosh 5. George McIntosh 3. Mary McIntosh 1. All Scottish. Final destination Winnipeg. Mary's age is given as 1yr. Had she been under 1yr she would have been classified as an infant, so certainly not Dec 1910 birth. This was a 21 day voyage so would have arrived in Canada abt 3rd June. The 1911 Canadian Census started 1st June but I believe, because of the widespread population & number of questions asked, it took enumerators until end of June to complete it. (Did they personally visit each household?) Anyway, lucky they arrived in time to be included. (Margaret & children should also be on 1911 Scottish Census 1st-2nd April) There is a George McIntosh on board the 'Hesperian' but a different Ticket No. & final destination to Margaret. I did find a George Mackintosh 24 Watchmaker possibly travelling with Wm Mackintosh 27 Warehouseman (brother perhaps?) both Scottish & both final destination Winnipeg, aboard SS 'Ionian', Allan Line, Official No: 113989. Departure 6th March, 1909 bound for Halifax & Portland. Not sure if timescale fits in with Mary's birth but then how accurate are birth years on Census Returns? Hope some of this information is helpful & not spoiling your 'joy of the hunt'.
Regards, Dod.