Some time later he began to be heavily criticized for the style of his writings[why?].
In the winter of 1872/73 he toured Egypt (Cairo, Alexandria and Luxor) which led to him publish some Travel letters, about his experiences there.
Subsequent research by others increasingly diminished the importance of his writings.
[4][5][6] He was elected as a member to the American Philosophical Society in 1872.
[7] Lauth published 184 books, papers and miscellaneous writings during his lifetime.