George Borrow,
Romano Lavo-Lil: Word Book of the Romany…
“ Patrin is the name of the signs by which the Gypsies who go before show the road they have taken to those who follow behind. We flings handfuls of grass down at the head of the road we takes, or we makes with the finger a cross-mark on the ground, we sticks up branches of trees by the side the hedge. But the true patrin is handfuls of leaves flung down; for patrin or patten in old Roman language means the leaf of a tree.The true way to be a wise man is to hear, see, and bear in mind. ”
