An entry in the publication Historic Court Records of Washington DC outlines that Catherine Fenton married Patrick Buggy on 23 October 1844.
This is the only information that is given.
 Walker, Homer, A. Unknown Publication Year. Historic Court Records of Washington DC, Volume 5, Marriage Records from Eader to Gregor. Washington DC: Lucinda Walker p.436; available online at FamilySearch Books https://books.familysearch.org/primo_library/libweb/action/search.do?vid=FHD_PUBLIC : accessed 10 April 2012