I Have had the pleasure of reading Mr. Bonney's paper, “On a Cirque at Skye,” and send you these few lines rather as an appendage to it than in the spirit of criticism. I think Mr. Bonney has made out the greater part of his case very well; but being a rather more “ardent glacialist” than he (though far less acquainted with glaciers), I do not think he has attributed quite enough to their operation in the formation of a cirque. Speaking of a Glacial period, he says, “The cliffs would still be cut back, by water in summer, by frost in winter; the talus borne away or crushed by the glacier, the rocks below somewhat worn and rounded, but still the completeness of the Cirque as a whole forbids us—unless we assign it entirely to glacial action—to suppose that it was more than slightly altered by this.”