Who did he marry and when and where? Who were the individuals he was living with in 1850? I saw a Civil War pension record for a Robert Alexander married to Elizabeth. The pension was applied for in Maryland on 25 July 1890, and then applied for again by his widow, Elizabeth, in Indiana on 17 May 1904. If this is the same Robert Alexander, then he died shortly before his widow applied for the pension and very possibly in Indiana.