No.	Title	Date
541	Letter: Mrs. W.S. Jennings to Ernest F. Coe, January 10th, 1936	1936-01-10
542	Letter: Mrs. W.S. Jennings to Ernest F. Coe, June 6th, 1937	1937-06-06
543	Letter: Mrs. W.S. Jennings to Harold Ickes, June 6th, 1937	1937-06-06
544	Letterhead stationery of the Everglades National Park Commission	circa 1950s
545	Letters	1911
546	Letters : to Minnie Moore-Willson	1918
547	Letters from O. A. Hardin describing Southern Drainage District plans for levees, dikes and canals	1918
548	Letters to Bernard MacFadden	1933
549	Letters to Paul C. Taylor, regarding timber contracts	1934
550	Literature Review on the Effects of Groundwater Drawdowns on Isolated Wetlands	1995-11
551	Litterfall in Pinelands of Everglades National Park	1985-03
552	Little Banana Patch & Shark River Headwaters (Stops XVII & XIX) ( 23 photograph sets )
553	Little Shark River (Stops 81-XXVI) ( 17 photograph sets )
554	Loaxahatchee Impoundment Landscape Assessment (LILA): Tree Island Experiments and Management; May 1, 2005 to September 4, 2009: Final Report	2009-08-17
555	Logging in the Everglades, ca. 1908-1910.	1910
556	Looking east	1904/1920
557	Looking East	1904/1920
558	Macro Invertebrate Responses to Phosphorus Enrichment in the Northern (WCA-2A) Everglades	2001-03
559	Mahogany Hammock (Stop 81-VI) ( 12 photograph sets )
560	Man Fishing in Canoe	1925