Richard L Myrick passed away on 13 Apr 1864 in Monterey, Putnam, Tennessee, USA
https://www.ancestry.com/genealogy/records/richard-l-myrick-24-8t8gwq

The following was obtained from this thread:

Richard L Myrick (1837 - 1864)

Lieutenant Myrick, a physician, was wounded and died at Monterrey TN, April 13, 1862.

Myrick, R. L. 2nd Lt., Dropped 10/62
Footnote.com