Hi Linda, Welcome to the world of genealogy, you are in for some fun!Do you have any dates, or approximate dates, for your grandfather?There are 7 Robert Burtons listed on the SSDI (Soc Sec Dth Idx) that were "long time or retired railroad workers."Do you know when he died?Even approximate year of birth and death would help narrow the playing field.
Once you determine when and where he died, you can obtain a copy of his death certificate, which should show the names of his parents.Once youhave his father's name, you can search for the family on census records, and pick up other children, and more family data.
Also, once you know when and where he died, you can search for an obituary, you never know whathelpful bits and pieces will pop up in old obits.
Talk to everyone in your family, that will give you the time, (^_^).Glean what you can from them, but be prepared, not all family stories will match up exactly, time plays tricks on our old memory cells.Names, dates and locations are very good, but even info such as nicknames, can be helpful, too.My grandparents both used their nicknames on their marriage record.Happy Hunting.