Thanks for the response on Capt. Lea. The real focus of my research is the operations of Capt. John Jarrette's Missouri squadron in northeastern LA in the early winter of 1863-64. Jarrette commanded two mounted companies under Cole Younger, of James-Younger gang notoriety and F.M. "Dave" Pool.
Lea and James as you know, rode with this organization, before they were rounded up by Confederate soldiers in Feb, 1864 for reportedly committing depredations against Southern men.
Lea replaced Jarrette in command and I often suspect that Cole Younger used Lea's exploits for the basis of some of his war history in his 1903 autobiograhy.
Needless to say, I'd be particularly grateful for any references to Younger and Jarrette in the diary.