Annosa Vulpes haud capitur Laqueo.

An old fox is not easily to be taken in a snare; age has made him cautious. The proverb may be applied to persons attempting to impose upon us, and to excite compassion by the relation of some affecting but improbable story. «Quære peregrinum», tell your tale to one less acquainted with you, or with the circumstances you are relating; they will gain you no credit here. A otro perro, con esse huesso, throw that bone to another dog.