Edwin Mims. Sidney Lanier. Boston, 1905.
 

A. B. Starke, Sidney Lanier: A Biographical & Critical Study,
Univ. of North Carolina Press, 1933.
Reprint, Russel & Russel, NY, 1964.
 
 
 

E. W. Parks, Sidney Lanier: The Man, The Poet, The Critic.  Athens, Univ. of Georgia Press, 1968.