Walter Emanuel, Punch, Volume 147, Issue 3820… (19th and 20th century)
“ My friend is an artist, and as such is accustomed to use his eyes. The other day he saw a smartly dressed man whom he conceived to be a German spy, for, besides wearing an alien aspect, he carried a walking-stick which tapered suspiciously on the way down, and near the top of it was an obvious little catch. ”
