1920 Census of Peterborough, Hillsborough, New Hampshire
George Johnson 35 Margaret Johnson 33 Howard Johnson 7 Charles Johnson 5 Arthur Johnson 3y2m
1930 census of Massachusetts > Worcester > Lancaster In the household of Clarance B. Sanderson
Clarence B Sanderson 40 Frederick L Sanderson 70 Frances E Schley 42 Howard W Johnson 17 Boarder Harold Mcgraw 17 Boarder
If not, do you have a census entry for 1920 that matches the family?If the above is your Howard, it stated in 1930 that he was born in Canada, English...or probably in Ontario.Records on line for Ontario births end in 1911 so that could be a problem.
Also, if the George in the 1920 census is your George, he was a caretaker on an estate.Possibly he had to go with the family to Canada as a member of the staff?Not sure, just a possibility.Of course, if this isn't your George, it doesn't matter....
Let us know something specific about George and Margaret...a census listing, other children, anything that will help locate them in a census.We can move from there.