This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
The tongue in a shoe will often slip down or over to one side or the other and expose the hose. To overcome this and have the tongue fit snugly in the right place, fasten a common lace clasp or hook near the top of the tongue, as shown in the illustration, so that in lacing the shoe the laces are passed under the hook to hold the tongue in place.
Ill: The Hook on the Tongue of the Shoe and Manner of Lacing to Hold the Tongue