To whom do you offer your shells for sale? To people who come from Saint Michel (where shells abound).
More French Proverbs:
Adversity makes strange bedfellows.French
A Montgomery division: all on one side, nothing on the other.
French
Mastiff never liked greyhound.
French
Out with the old, in with the new.
French
To one who has a pie in the oven you may give a bit of your cake.
French
Nothing is so liberally given as advice.
French