"The rock lowest down in the series is dark reddish-grey syenite."
"The grin was partly masked by masses of reddish-grey beard and whiskers; a perfect jungle of a beard, such as is sometimes grown by white men living in the jungles; but the eyes above the snub nose had nothing about them in the least wild or outlandish."
"Rather a rich brown in general tone, the exposed surfaces of the bluff display an attractive collection of geological fragments, rough and angular pebbles and sharp chips of speckled granite quartz of the purity of alabaster, reddish-grey porphyry, with occasional pieces of brick-red sandstone, nodules of greenish-black basalt, etc."