Authors:

Strength is an empty shell.

Jack London (2017). “JACK LONDON Ultimate Collection: 250+ Works in One Volume: Novels, Short Stories, Plays, Poetry, Memoirs, Essays & Articles (Illustrated): The Call of the Wild, The Sea-Wolf, White Fang, The Iron Heel, The Scarlet Plague, A Son of the Sun, Son of the Wolf, South Sea Tales, Children of the Frost, John Barleycorn, The War of the Classes…”, p.1095, e-artnow
Strength is an empty shell.