de gras

The oil, when cool, solidifies, and it is sold under the name of “de gras”, or Yorkshire grease.

... they could busy themselves greasing the mill machinery to preserve it from muddy water and any consequent rusting, use the barrels of de gras on hand for lubricating hemp. The mill would stink like a sheepfold, but nothing was more water-resistant than a thick layer of wool fat.