James Mulvey, 1820

Hi, I'm well aware that this is a longshot but I have spent 15 years searching for information on a James Mulvey who was born in Leitrim, Ireland around 1820. He may have emigrated over in 1844 with his sister Catherine. He allegedly died in Lynchburg Virginia, USA on July 27th, 1858. He was supposed to have three sisters, Catherine, Jane, and Mary who were also in the United States at the time of his death and allegedly resided in Springfield, Massachusettes. He left these individuals a sum of money so it can be supposed that he was unmarried and childless at the time of his death. James is buried in the St. Mary's Cemetery in Windsor Locks, Connecticut. I have contacted the cemetery and they have no records beyond what is located on the man's headstone. It's very unusual for an individual to have their body transported and thus embalmed prior to the Civil War. 

 I have spent many hours scouring the internet looking for death/birth/land records for this gentleman across ancenstry.com, genealogybank, familysearch, newspapers.com a variety of other sites just to come up empty. I do not know what his parish was and lack any other substantial information but I would graciously appreciate ANY assistance in this matter.