I looked for a marriage record on this couple in the Diocese of Baton Rouge Catholic Church records, Vol. 16 1883-1885), but found none.
West Baton Rouge Parish, PO Box 757, Port Allen, LA 70767-0757 Par Clk has m, div, pro, civ ct & lnd rec from 1897 (504-383-4788)Source: Eighth Edition of the Handy Book for Genealogists by The Everton Publishers, Inc., 5th printing 1995 (Area code may have changed)
West Baton Rouge Parish, Brusly This past year, my grand-niece married in this church. St. John The Baptist (Est. 1835) P. O. Box 248, Brusly, LA 70719 Registers: Records prior to 1870 are housed in the BRDA (Baton Rouge Diocesan Archives): Marr. 1876/Bapt. 1840/Fun. 1846. The marriage records only begin in 1876. The West Baton Rouge Courthouse has a volume of Catholic marriages dating 17 May 1841 to 26 Jan 1879 from the Catholic Church.
Port Allen Holy Family Church (Est. 1928) P. O. Box 290, Port Allen, LA 70769 Registers: 1776
A good place to look for race is the census. Most libraries have a subscription to Ancestry.com that includes the census. Ask your librarian for help.
I am a native of Evangeline Parish, Louisiana. I have lived in Birmingham, AL since the early 1950s. I still have family and friends in Evangeline Parish and I have crossed the Mississippi River at least twice a year and know this area pretty well.