Robert Montgomery Bird was the author of one of the early seminal works on Mammoth Cave: 1838. Bird, Robert Montgomery. 1838. Peter Pilgrim: or A rambler’s recollections, Volume 2. Including: The Mammoth Cave. Pp. 47- 162. Publisher: Philadelphia, Lea & Blanchard. 260 pp, (https://archive.org/details/peterpilgrimora00birdgoog). Interestingly I found he is listed as the author of on of the top 100 American Novels by American Scholar: http://theamericanscholar.org/one-hundred-best-american-novels-1770-to-1985-a-draft/#.VBx2V_ldWSp for the book Shepard Lee (1836). Shepard Lee download: https://archive.org/details/sheppardlee00birdgoog
He also was an artist who painted three watercolors of Mammoth Cave.