r from impotent
bull, but not with another bull. But it is too long a story--it is to
attempt to make two strains, both fertile, and yet sterile when one
of one strain is crossed with one of the other strain. But the
difficulty...would be beyond calculation. As far as I see, Tegetmeier's
plan would simply test whether two existing breeds are now in any
slight degree sterile; which has already been largely tested: not that I
dispute the good of re-testing.

LETTER 155. TO HUGH FALCONER.

(155/1. The original letter is dated "December 10th," but this must, we
think, be a slip of the pen for January 10th. It contains a reference to
No. VI. of the "Lectures to Working Men" which, as Mr. Leonard Huxley
is good enough to inform us, was not delivered until December 15th, and
therefore could not have been seen by Mr. Darwin on December 10th. The
change of date makes comprehensible the reference to Falconer's paper
"On the American Fossil Elephant of the Regions bordering the Gulf of
Mexico (E. Columbi, Falc.)," which appeared in the January number of the
"Natural History Review." It is true that he had seen advanced sheets of
Falconer's paper ("Life and Letters," II., page 389), but the reference
here is to the complete paper.

In the present volume we have thought it right to give some expression
to the attitude of Darwin towards Owen. Professor Owen's biographer has
clearly felt the difficulty of making a statement on Owen's attitude
towards Darwinism, and has ("Life of Sir Richard Owen," Volume II., page
92) been driven to adopt the severe indictment contained in the "Origin
of Species," Edition VI., page xviii. Darwin was by no means alone in
his distrust of Owen; and to omit altogether a reference to the conduct
which led up to the isolation of Owen among his former friends and
colleagues would be to omit a part of the history of science of the
day. And since we cannot omit to notice Darwin's point of view, it seems
right to give the facts of a typical case illustrating the feeling
with which he regarded Owen. This is all the more necessary since the
recently published biography of Sir R. Owen gives no hint, as far as we
are aware, of even a difference of opinion with other scientific men.

The account which Falconer gives in the above-mentioned paper in the
"Nat. Hist. Review" (January, 1863) would be amusing if the matter were
less serious. In 1857 Falconer described ("Quart. Journ. Geol. Soc."
XIII.) a new species