A succeeding blankness of mind awoke to the clip-clop of hoofs and her father's cheery halloo.
"The Desert of Wheat"
Zane Grey
He marches up and down, beating two pieces of wood together-clop-clop, clop-clop-as he walks.
"Peeps at Many Lands: Japan"
John Finnemore
Fred Farraday drove me home from Presho, weary to the bone, and content to ride without speaking, listening to the steady clop-clop of the horses over that quiet road on which we did not meet a human being.
"Land of the Burnt Thigh"
Edith Eudora Kohl