Subject/Tag - Caves/Underground

C

The Cavern of Death; or, The Maiden Avenger

H

The Haunted Cave; or, The Land of Wonders
The Hidden Cave. A Legend of the Ohio

L

Lost in the Sewers; or, Adventures Beneath a Great City
Lost Under Ground; or, A Week in the Dark

W

The Wizard of the Deep; or, The Wonderful Ocean Cave

Y

Young Sleuth and the Copper Mine Mystery; or, The Detective's Underground Clew. A Thrilling Story of the Smugglers of the Northwest
Young Sleuth in the Sewers of New York; or, Keen Work from Broadway to the Bowery
Young Sleuth's $100,000 Game; or, Monte Carlo in New York. A Mystery under the Pavements of New York
Young Sleuth's Dark Trail; or, Under the Pavements of New York. A Story of Strange Adventures in the Great City