I am looking for information on my great grandfather who was Schoolmaster at Penang Free School and my grandfather, who was born there.

Great Grandfather:
William Hamilton
Head Schoolmaster, Penang, Straits Settlements, Malaysia
Wife: Unknown

William Hamilton shows up as a approved Juror in 1904 and on Wikipedia's site for Penang Free School

I had found a brief reference of he and Mrs. Hamilton returning to PFS to speak after the war but haven't been able to find it again. I think it was a service you had to pay for to get the rest of the information.

Grandfather:
William Samuel Hamilton b 1897 (emigrated to ON, Canada mid 1920s) (I'm not 100% sure of siblings)

Other siblings
Samuel (worked in Venezuela in oil business)
Pat (emigrated to ON, Canada), wife: Vicky, Sons: Pat, Mike?
Mike
Mary

The other children may have been born in Penang or Ireland. I have no idea of birth order, dates.

I'm really at a loss and would appreciate any help at all.