Francis Galton,
The Art of Travel; Or, Shifts and Contrivances Available in Wild Countries
“ A trader in Namaqua Land, took red paint, and tied a brush on to a long stick; with this he made a daub on the hind quarters of the freshly-bought and half-wild cattle, as they pushed through the door of his kraal. It naturally excites great ridicule among natives, to paint an ox that he may be known again; but, for all that, I think the trader's plan well worth adopting. The same might be done to sheep, as a slit ear is not half conspicuous enough. A good way of marking a sheep's ear is to cut a wad out of the middle of it, with a gun-punch ”
