LE PLONGEON (Dr. Augustus).
Vestiges of the Mayas; or, Facts tending to prove that communications and intimate relations must have existed in very remote times between the inhabitants of Mayab and those of Asia and Africa. By Augustus Le Plongeon, M. D. New York; 1881. 8o.
(a) p. 29.
LEWIS (Capt. Meriwether) AND CLARKE (Capt.).
Travels to the source of the Missouri River, etc., and across the American Continent to the Pacific Ocean, * * * in the years 1804, 1805, and 1806. By Captains Lewis and Clarke. Published from the Official Report. * * * London; 1814. 8o.
(a) p. 66. (b) p. 375. (c) p. 379.
LEWIS (T. H.).
Incised Bowlders in the upper Minnesota Valley. In The American Naturalist for July, 1887.
(a) p. 642. (b) p. 639 et seq. (c) ib.