The Goat and the Goatherd
A Goatherd had sought to bring back a stray goat to his flock.
He whistled and sounded his horn in vain; the straggler paid no
attention to the summons. At last the Goatherd threw a stone,
and breaking its horn, begged the Goat not to tell his master.
The Goat replied, "Why, you silly fellow, the horn will speak
though I be silent."
Do not attempt to hide things which cannot be hid.
(see C.H. Gibbs-Smith in Stenton - Stag hunting)