An empty cylinder of odds and ends

Gene Wolfe, The Island of Dr. Death and Other Stories,New York, A Tom Doherty Associates Book, 1997, p. 29.

Daw wondered what Gladiator’s bionic correlation program would say about Gladiator herself. Perhaps liken her to the armor of a caddis-fly larva — an  empty cylinder of odds and ends. Caddis-fly armor exploded. The interior of his helmet held the familiar smells of fine libricating oil, sweat, and the goo he sometimes used on his hair ; he hicked down and the soles of his boots clinked home on the hull of the bridge module.