You are very welcome.I have ancestors from Yolo County, so I know how terrible their spelling was on these census records. :>)
I found an Alexander Malcolm bn Canada, living in Humboldt Co, CA.Is this his brother??You can find this one, they spelled the name right. Better spellers lived in Humboldt I guess.
If you have access to the 'paid' Ancestry.com site, you can view the actual Newpaper entry for Malcolm's Obit.Often a local Family History Library (LDS) has a subscription and you can bring it up there.