Another powerful line from 'Six Weeks'

From my
current reading:
British Capt. Alan
Hanbury-Sparrow, who served in World War I, called chemical weapons "the
Devil's breath." (That would be a great title for a history of chlorine and
mustard gas.) Soldiers wearing gas masks, he wrote, looked like "imbecile
frogs" -- I guess especially in the green haze of chlorine.