Thank you to all that had a look at, and responded to my query, regarding the initials "HB", in the 1880 census. I am told there is a bracket and asterisk on the page and a note to the effect that the initials are actually meant to be "NB", for New Brunswick. With that confirmation, all the other details I have for these two boys fall into place. They were born in Albert County, New Brunswick and their parents and older brother, Charles, are found in 1880, in New Castle County, Delaware. Charles is listed as a "School teacher", which may account for the two younger boys being in that school in Boston. As well, there were other relatives to the boys, who lived in Boston. According to the trusty "Relationship Calculator" in my genealogy programme, they would be my "first cousin twice removed". I am very grateful to all who took the time and effort to respond... you are a wonderful group. Richard