The will of Dr. Croghan, probated February 5, 1849, left the entire Mammoth Cave estate in the hands of trustees for the benefit of his nine nephews and nieces, namely, the sons and daughters of Colonel George Croghan and General T. S. Jesup; with the proviso that when they should all have died, the trustees should sell the estate at public auction. Unless some of the heirs should buy it, a desirable purchaser might be the Louisville and Nashville Railroad Company; or the entire group of caverns in the vicinity might be converted into a State or national park. Meanwhile we are content that it should remain under the excellent management of the present trustees.

No guides are employed but those who are trustworthy. Stephen Bishop and Matt Bransford have passed away; so have Nicholas Bransford and William Garvin. Tom Lee, my first guide, and John M. Nelson, with whom I have made many an underground trip, are not now in service. Those whom one is likely to meet at present are Edward Bishop, William Bransford, Robert Lively, and Joshua Wilson, with several other capable guides at hand for emergencies. All are heroes of many adventures, and their strong arms have rescued many a visitor from disaster. Their word is law, and no one is allowed to enter without a guide. Hence accidents are of rare occurrence.

Hovey's Handbook of The Mammoth Cave of Kentucky — Part 8

The fact so widely heralded that, in the spring of 1909, a party of “Shriners” got lost in the Cave for eight hours, was wholly due to their refusing to obey the guides, and breaking away from their comrades under the voluntary and unauthorized leadership of one of their own number. As soon as possible guides were dispatched to their rescue, who brought them safely out to the open air.

Hovey's Handbook of The Mammoth Cave of Kentucky — Part 8

For the convenience of visitors, as well as with reasonable consideration for the guides themselves, certain hours and routes are fixed, from which it is not customary to depart, unless by special arrangement with the management. Four routes are mapped out, the uniform charge for each being two dollars. For terms for the season, or for large parties, etc., as well as for information as to hotel rates, and indeed for anything special, visitors should apply to the Mammoth Cave manager. Cave suits are to let, and proper methods of illumination are provided by the guides. Even a few hours of wandering below ground will be worth while; but those who can remain amid these wonderful scenes for a longer period will be amply repaid by incessantly varying sights and experiences.

Hovey's Handbook of The Mammoth Cave of Kentucky — Part 8