I reread my original post, and I certainly did imply that the 1900 Census said that William Graham was born in Canada.I did not mean to state that.I may have assumed the 1900 Census said Canada because the the 1910 and 1920 census listed that was William's birthplace.I'm sorry for the confusion.
I took a look again at that census, and it is too difficult to read.It looks as if the census taker scribbled over their information.The 1900 index does not even list a birth place for William.If you feel comfortable with sending me your email address, I would be very happy to email a copy of the census to you.
The 1910 and the 1920 census do list William's birthplace as Canada.I come across this situation all of the time, and the usual explanation is that the individual may have been born in one of the location, but grew up in the other.I do get the impression for other censuses that William was generally thought to have been born in Canada.For instance, the 1930 Census of Donald Graham lists that Donald's father was born in Canada.William Jr. in the 1930 Census said that his father was born in Canada.But then again, Karl Graham had stated in the 1920 Census that his father's birthplace was not known but that it was in the U.S.
I've been doing this for a number of years, and the rule of thumb I usually use is that I go with the earlier censuses, knowing that people's memories fade as we get older.The only reason why I personally would not do so in this case is because William Graham gave an immigration date in the 1910 and 1920 Census.
I think you have a few options though.I would first try to get some obituaries for either William's wife, or his children.Another resource you have available is the 1880 Census.I did not try to look there because I can only imagine how many people named William Graham will show up, but whether he was born here or immigrated here circa 1875, he should be in that census (you can always search the 1881 Canadian Census).Also, finding William and Emilie's marriage record might help.At least it appears that the couple married in the Seattle area.The 1910 Census said that they were married for 26 years.
I'll be glad to do anything that I can to help.I wish that I had a more definite answer for you.I have very few records for Canada, but I'll go through what I have.If I find anything, I'll let you know.