This marriage record was published in SOUTHWEST Louisiana Records by Rev. Donald J. Hébert. I did not find this marriage record in SOUTH Louisiana Records V. 7 (1881-1885). Although Fr. Hébert and his volunteer researchers often included research from other parishes in SWLR, this is the first and only time I ever saw a mix-up like this on!
William Blanchard of Assumption s/o Firmin & Marie Clement m. 12 Jan Julia Olivier of Terrebonne d/o Valery & Marie Navarre. SWLR Hébert, V. 16, p. 436
Assumption Parish of Plattenville est. 1793 Source: Diocese of Baton Rouge Catholic Church Records