Hello again Jackie
Think I've found the family on the 1851 census - minus Alexander - and a further 2 children born since the '41 census. Have searched for Alexander as that + Alex/Alexr and both Mc and Mac. Only 2 hits come up for an age 35 to 45 and I'm sure neither is your man.
Used the
www.freecen.org.uk site - still in Heast
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MCINNES Rachael Wife M F 42 Crofters Wife 4 Acres Inverness-shire - Strath
MCINNES Niel Son U M 18 Crofters Son Inverness-shire - Strath
MCINNES Catharine Dau - F 16 Crofters Dau Inverness-shire - Strath
MCINNES Duncan Son - M 14 Inverness-shire - Strath
MCINNES Chirsty Dau - F 11 Inverness-shire - Strath
MCINNES Isabella Dau - F 5 Inverness-shire - Strath
MCINNES Donald Son - M 3 Inverness-shire - Strath