"You walke for ye most part in ye Large spaces Called ye Roomes on a sandy floore, the Roofe so Lofty one Can scarce discern the top and Carry's a Great Eccho, soe that takeing up a great stone as much as a man Can heave up to his head and letting it fall gives a report Like a Cannon wch they frequently trye and Call ye Shooteing ye Cannons."