Marty, We found a family marriage record in "District of Columbia Marriage Licenses Register 2 1858-1870", compiled by W.Pippenger. Trinity Methodist Church, Washington, DC was the church where the marriage was performed in 1857. I found a Trinity Methodist Church in Alexandria but this was after the period when Alexandria was part of DC. I also find Trinity Church (Historical) listed in DC but no location. Do you have any information on where this church might be located? Thanks. Virginia Olander