These are the Biographies on President Zachary Taylor (1849-1850)

Title:       General Taylor and his staff: comprising memoirs of Generals Taylor,
                 Worth, Wood, and Butler: Colonels May, Cross, Clay, Hardin, Yell,
                 Hays, and other distinguished officers ... interspersed with numerous
                 anecdotes of the Mexican war ... Compiled from public documents and
                 private correspondence.
Imprint:   Philadelphia, Grigg, Elliot, 1848.
 

Author:     Montgomery, H. (Henry)
Title:         The life of Major General Zachary Taylor, twelfth president of the
                 United States. By H. Montgomery.
Imprint:    Auburn, Derby, Miller & company, 1850.