Gilbert Russell and Phebe Fitzpatrick marriage is recorded in Book A, page 79, married by J. P. Alsup, Minister of the Gospel, 20 March 1871.

Gilbert Russell and Huldah Watson marriage is recorded in Book 3 & 4, page 7, married at John S. Smith's with T.M.C. Bennett and John Smith as witnesses by O. Wood, Justice of the Peace.

Doubt that these are recorded in Missouri Marriages Book, 1851-1900, very few marriages are.  County records are best if they exist.