This register of freedmen lists 17 freed men, women and children with the last name of Singleton, all formerly enslaved on the Manning estate in Ascension Parish, LA. Those listed may very well be extended family. If you are researching the name Singleton in Ascension Parish this document may open new research windows.
You can view the entire register here on Internet Archive.
Records of the Field Offices for the State of Louisiana, Bureau of Refugees, Freedmen, and Abandoned Lands. NARA Micropublication M1905, Roll 29, Frame 225 of 442. Internet Archive, https://archive.org/stream/recordsoffieloui0029unit#page/n224/mode/1up, accessed December 30, 2014.