She's at RG12; Piece: 1830; Folio 40; Page 12, with Richard & Maria.
Interestingly, while looking for the marriages of their children I found the marriage of a Beatrice E (not M!) in Dec 1910, Truro, which is why she wasn't with the family in the 1911 census.
It's ok Deb, thanks. I had a look for them and didn't find anything unexpected so didn't look at the image! I only had 120 credits so had to prioritise!