His most characteristic illustrations, in my opinion, were done in pen-and-ink. A few of these are shown below along with works in other media. Some of the images can be enlarged by clicking on them.
Brindle was basically a careful artist who seldom tried for flashy effects. But his illustrations were not necessarily static and dull (unless an art director insisted on him doing so). My take is that, at his best, his illustrations were pleasing and satisfying.