If he passed away in Boise, the Idaho Statesman would probably have the obituary. It did not run in the Idaho World, even though he was buried in Idaho City. There is a Joseph Parker buried here also. Dates would indicate a brother or nephew/cousin if they are related. May be he liked the area and requested burial here. Do you need a picture of the headstone, if there is one? I can't do it now due to the snow level, but spring would work. contact me directly at
graves@graves-r-us.com.