• 2 Memorial Library
• 1 Wisconsin Historical Society Archives
• 1 Wisconsin's Water Library

• 1 Maps, Atlases

• 82 History
• 29 Antiquities
• 28 Legends
• 27 Mines and mineral resources
• 25 Shipwrecks
• 23 Gold mines and mining
• 23 History, Local
• 12 Folklore
• 9 Description and travel
• 9 Miscellanea
• 6 Gold discoveries
• 6 Maps
• 6 Nuestra Señora de Atocha (Ship)
• 6 Underwater archaeology
• 5 Silver mines and mining
• 4 Ghost towns
• 4 Outlaws
• 3 Adventure and adventurers
• 3 Beale, Thomas Jefferson
• 3 Excavations (Archaeology)
• 3 Prospecting
• 3 Spaniards
• 2 Ciphers
• 2 Coin hoards

• 16 Jameson, W. C., 1942-
• 9 Henson, Michael Paul
• 9 Rascoe, Jesse E. (Jesse Ed)
• 5 Terry, Thomas P
• 4 Paterson, T. W. (Thomas William), 1943-
• 3 Basque, Garnet
• 3 Gaines, W. Craig, 1953-
• 3 Harris, Graham, 1937-
• 3 Lazeo, Laurence Andrew, 1946-
• 3 Library of Congress. Map Division
• 3 Thompson, George A
• 3 Traywick, Ben T
• 3 Weight, Harold O., 1911-
• 2 Bartholomew, Ed Ellsworth
• 2 Crooker, William S
• 2 Ferguson, Robert G., 1968 November 7-
• 2 Finnan, Mark, 1944-
• 2 Fish, Frank L. (Frank Leslie), 1863-
• 2 Fox, Theron
• 2 Frederickson, Arthur C
• 2 Gardner, Erle Stanley, 1889-1970
• 2 Hult, Ruby El, 1912-2008
• 2 Ladd, Richard S. (Richard Stockwell), 1899-
• 2 Lovelace, Leland, pseudonym
• 2 MacPhie, Les, 1941-

• 28 Arizona
• 22 United States
• 16 Nova Scotia
• 15 Texas
• 14 Oak Island (Lunenburg)
• 14 Oak Island Treasure Site (N.S.)
• 12 Southwest, New
• 12 West (U.S.)
• 11 Superstition Mountains (Ariz.)
• 10 Florida
• 10 Superstition Mountains
• 7 New Mexico
• 7 Oak Island (Lunenburg, N.S.)
• 6 California
• 6 Colorado
• 5 British Columbia
• 5 Virginia
• 4 Nevada
• 4 Northwest, Canadian
• 3 America
• 3 Atlantic Coast (U.S.)
• 3 Bedford County
• 3 Bedford County (Va.)
• 3 Canada
• 3 Death Valley (Calif. and Nev.)

• 12 Anecdotes
• 6 Biography
• 4 Bibliography
• 4 Guidebooks
• 2 Maps
• 1 Catalogs
• 1 Fiction
• 1 Folklore
• 1 History
• 1 Miscellanea
• 1 catalogs (documents)

Limit year range