Edmund Selous, The Bird Watcher in the Shetlands (1905)
“ There is a constant clang and scream, an eternal harsh music—harmony in discord—through and above which, dominating it as an organ does lesser instruments—or like "that deep and dreadful organ-pipe, the thunder"—there rolls, at intervals, one of the most extraordinary voices, surely, that ever issued from the throat of a bird: a rolling, rumbling volume of sound, so rough and deep, yet so full, grand, and sonorous, that it seems as though the very cliffs were speaking—ending sometimes in something like a gruff laugh, or, as some will have it, a bark. ”
