Correction to transcription, Fred Vaughan to Walt Whitman, 27 March 1860

Ed Folsom pointed out a transcription error in the letter from Fred
Vaughan to Walt Whitman, 27 March 1860
(http://whitmanarchive.org/biography/correspondence/cw/tei/loc.00569.html).
The phrase "It appeared to me to be strained" had been incorrectly
transcribed as "I appeared to me to be strained." I have fixed this
mistake.

~Liz