I copied this from the Wolcott Library files. It may not be complete, lines missing at bottom, etc. I will correct any misspellings I notice. If you have any information on the following, I would appreciate it.
Abrahams Cave - Deadman's - Sleeping Giant State Park - Hamden
American Legion & Peoples Forest - Indian caves - Barkhamsted
Audubon Center - Leatherman's cave - Greenwich
Baldwin Caves - Coltsfood Mt. Caves - Cornwall
Bashful Lady Cave - Twin Lakes Caves - Salisbury
Beacon Gap Caves - Naugatuck Forest - Naugatuck
Bears Cave - Nystrom Pond State Park - Northfield
Bears Den - Near Tories Den - Burlington
Bears Den - Leatherman's Cave - Woodbury
Bears Hole - Candlewood Lake Trail - New Milford
Bear Ledge - Billings Lake Cave - North Stonington
Bill Warren's Den (a.k.a. Will Warren's Den) - Rattlesnake Mt. - Farmington
Billings Lake Cave - Bear Ledge - North Stonington
Black Home Cave - Near Squaw Cave - State Park - Bolton Notch
Black Rock Caves - Black Rock State Park - Watertown
Black Sal's Cave - Box Mountain - Bolton Notch
Bolton Notch Caves State Park - Bolton Notch
Boys Half Way River Caves - Devils Den - Monroe
Brazee's Cave - Mt. Riga - Salisbury
Brethren Rocks - Sheppard Ave. - Hamden
Candlewood Caves - New Milford
Canyon Pit - Sleeping Giant State Park - Hamden
Cat Hole Cave - near Campbell Falls - Mass-Conn Line - Norfolk
Cat Rocks - Union
Cave Hill - Haddam
Castle Rock - Seymour
Cave of Ben Vanue (Venue, by old post cards) - Litchfield
Cave of the Black Well - Sleeping Giant State Park - Hamden
Chatfield Hollow Indian - Chatfield State Park - Killingworth
Chief Compunce Cave - Lake Compounce - Southington
Chief Ponus Indian Cave - New Canaan
Cochegan Rock Cave - Norwich
Colts Foot Mountain - Baldwin Caves - Cornwall
Coltsfoot Mt. Ice Caves - near Baldwin Caves - Cornwall
Conn. Cement Swindle Mine - Shepard's Cave - Woodbridge
Cotton Hollow Brook Caves - Straitsville - Naugatuck
Council Caves - Indian - Barkhamsted
Council Rock Caves - Squantz Pond State Park - New Fairfield
Council Rock Caves - Chatfield Hollow State Park - Killingworth
Cromps (Crumps) Oven - Canton Center
Deadman's Cave - Abrahams cave - Sleeping Giant StatePark - Hamden
Den Woods Caves - Ridgefield
Deep Hollow - Leatherman's Cave
Devantry's Cave - Lakeville
Devil's Den - Straitsville - Naugatuck
Devil's Den - Sterling
Devil's Den - Dragon Hole - Ayers Gap - Baltic
Devil's Den - Boy's Half Way River - Monroe
Devil's Den - Montoe
Dragon's Hole - Devilıs Den - Ayers Gap - Baltic
Driggs Cave - New Hartford
Dugway Cave - Leatherman's - Woodbury
Erickson's Pit - Salisbury
Esophagus Cave - Sleeping Giant State Park - Hamden
Ester's Cave - South Canaan
Falls Village Caves - Falls Village
Fans Caves - Hamden
Frey's Caves - Pine Rock - New Haven
Gremaliel's Den (Gamaliel's) - Roxbury
Greystone Cliff Cave - Waterville - Waterbury
Greystone Cave - Lion's Head Trail - Waterville - Waterbury
Great Falls on Housatonic - Water Caves - Falls Village
Hemmingway's Lookout Shelter Cave - Chippens Hill - Burlington
Hermit Cave - West Mt. - Ridgefield
High Crevice Cave - Mt.Riga - Salisbury
Honey Potts Caves - Wolcott
Hungerford Cave - Sherman
Indian Caves - Amer. Legion & Peoples Forest - Barkhamsted
Indian Caves - Cotton Hollow Brook - Naugatuck
Indian Council - Tunxis Trail - Barkhamsted
Indian Cave - Samp Mortan Brook - East Fairfield
Indian Cave - Niantic - East Lyme
Indian Cave - East Glastonbury
Indian Caves (2) - Sachem's Head - Guilford
Indian Caves - Conn. Turnpike - Guilford
Indian Rocks - Appalachian Trail - Kent
Indian Council Caves - Chatfield Hollow State Park - Killingworth
Indian Caves - Norwalk
Indian Cave - Blue Trail - Prospect
Indian Caves - Indian Mt. - Indian Lake - Sharon
Indian Shelters - Naugatuck River Valley - Watertown
Indian Caves - Back of Post Office - Salisbury
Isreal Putnam's Den - Wolfıs Den State Park - Pomfret
Jack's Cave East - Blue Trail - west of Spindle Hill - Wolcott
Jack's Cave West - Allentown Rd. - Terryville
Jack in the Pulpit Cave - Twin Lakes - Salisbury
Jerico (Jericho) Rock Cave - Blue Trail - Mattatuck State Forest - Watertown
Judges Cave - West Rock - New Haven
King's Cave - Squaw Cave Group - Bolton Notch State Park Bolton Notch
King Phillips Cave - Talcott Mt. - Simsbury
Kidd's Treasure Cave - Money Island - Stony Creek
Labrinth (Labyrinth) - Taconic - Part of the Twin Lakes System - Salisbury
Ladder Cave - Part of Leets Island Group - Guilford
Leatherman's Cave - Bridgewater
Leatherman's - Blen's St. - East Bristol
Leatherman's - Tories Den - Burlington
Leatherman's - Chester
Leatherman's - Clinton
Leatherman's - Joe's Hill - Rt. 84 - Danbury
Leatherman's - Durham
Leatherman's - Pine Rock Shelter - East Haven
Leatherman's - Holt Hill District - Plymouth
Leatherman's - Essex
Leatherman's - Audubon Center - Greenwich
Leatherman's - Prospect Mt. - Litchfield
Leatherman's - Iverton
Leatherman's - State Park- Meriden
Leatherman's - Mt. Higby - Middletown
Leatherman's - New Canaan
Leatherman's - New Fairfield
Leatherman's - New Milford
Leatherman's - Norwalk
Leatherman's - Saybrook
Leatherman's - South Wilton
Leatherman's - Southington
Leatherman's - Black Rock Park - Watertown
Leatherman's - Westport
Leatherman's - Rimond Rd & Fountain St. - Woodbridge
Leatherman's - (4) - one at Dugway - Rt. 6 - Woodbury
Leets Island Caves - Guilford
Lions Den - Brooklyn - Danielson
Lions Head Trail Cave - Greystone Cliff - Waterville - Waterbury
Litchfield Cave - Milton Rd. - Litchfield
Long Hill - Small Rock Shelters - off Rt. 69 - Waterbury
Maze or Labrinth Caves - part of Twin Lakes System - Salisbury
Miles Caves - part of Twin Tales System - Salisbury
Meridan Natural Ice House - Meridan
Miles of Ledges - Small caves - Blue Trails - Burlington
Moodus Cave - Cave Hill - Moodus
Morico's Cave - Indian Cave - Guilford
Natural Bridge Cave - Part of Leets Island Group - Guilford
Natural Stone House - App. Trail - Prospect Mt. - Falls Village
Natural Stone House - Mattatuck State Forest - Thomaston
Niantic Indian Cave - East Lyme
Nineva Falls Cave - Chatfield Hollow Forest - Killingworth
Northford Ice Gorge - North Branford
Old New Gate Prison - Copper Mine Prison - East Granby
Oxford Cave - Oxford
Papoose Cave - Chief Compounce - Lake Compounce - Southington
Pakhe's Cave - Riverton - Hartland
Peoples Forest Indian Caves - State Forest - New Hartford
Phillips Caves - Putnam Mem. Park - Redding
Pine Rock Cave - New Haven
Pootatuck Indian Caves - Back of Squantz Pond in St. Forest - New Fairfield
Prospect Mt. - Leatherman's Shelter - Litchfield
Queen Ann's Cave - Talcott Mt. - Simsbury
Ragged Mt. Caves - Blue Trail - Berlin
Rattle Snake Den - App. Trail - Kent
Robbert Rock - Middletown
Rock House Cave - Black Rock Mattatuck Forest - Crane Lookout - Watertown
Rock House Cave - App. Trail - Prospect Mt. - Falls Village
Rocky Neck Cave (Bakers) - State Park - Lyme
Sackets Cave - Pine Orchard Dist. - Chatfield Hollow - Killingworth
Salisbury High Crevice Cave - Salisbury
Salisbury Ice Gorge - Salisbury
Samp Mortar Indian - Fairfield
Sarah Bishop's Cave - Ridgefield
Sawmill River Caves - Guilford
Sessions Woods Caves - Whigville - Burlington
Seven Chambers - Thomaston
Sheppard's Swindle Mine - Blue Trail - Woodbridge
Sleeping Giant Park - Deadman's, Talus, Spider, Black Well, Esophagus - State Park - Hamden
Squantz Pond - Squaw & Council Rock - New Fairfield
Squaw Rock Caves - Plainfield
Strait's Rock Caves - Road Side Park - Rt. 7 - Gaylordsville - New Milford
Stoddard Hill Cave - State Park - Ledyard
Suicide Cave - Mt. Tom - Northville - New Milford
Talus Cave - Candlewood Lake Blue Trail - New Milford
Talus Cave - Sleeping Giant State Park - Hamden
Tony's Indian Cave - Ridgefield
Tories Den - Blue Trail - Chippens Hill - Leatherman's - Burlington
Tories Den - on Blue Trail - Rt. 7 - New Milford
Tories Hole - Darien
Totoket Indian - North Branford
Tunxis Indian - Council Cave - Blue Trail - Barkhamsted
Turkey Mt. - Leatherman's
Twin Lakes Caves - Cave Hill - Salisbury
Upper Caves - Leets Island System - Guilford
Warners Cave - Salisbury
Waterville Caves - Base of Cliffs - Waterville - Waterbury
West Peak Caves - Leatherman's (?) - State Park - Meridan
Weston Indian Caves - Weston
Whigville Caves (2) - Sessions Woods - Whigville - Burlington
Wildcat Den - Gree? Pond Mt. - Sherman
Wintergreen Falls and Gorge - New Haven
Wolcott Caves - Rt. 69 - Wolcott
Wolf's Den - near Tories Den - Blue Trail - Burlington
Wolf's Den - Putnam Park - Pomfret
Wolf's Den - Falls Village
Wolf's Hollow Ice Cave - Sharon - Salisbury
York Cave - Crane Lookout - Reynold's Bridge - Thomaston