P.S.--I happen to have by me a rare, almost invaluable set,
which I can dispose of at a certain figure.
SIR,--Dr. GRACE is now getting on for fifty. In another four years he
will complete his half century. _Therefore_ he is no chicken. _Ergo_,
he may one day have a duck's egg. I withhold my subscription, to
accumulate with interest, till _that_ occurs.