On the margin of a photograph of himself, presented to Morse by the
baron, is an inscription in French of which the following is a
translation:--

To Mr. S.F.B. Morse, whose philosophic and useful labors have rendered
his name illustrious in two worlds, the homage of the high and
affectionate esteem of Alexander Humboldt.

POTSDAM, August 1856.

The next thirty days were spent in showing the beauties of Cologne,
Aix-la-Chapelle, Brussels and Paris to his wife and niece, and in the
latter part of September the little party returned to London. Here Morse
resumed his experiments with Dr. Whitehouse and Mr. Bright, and on
October 3, he reports to Mr. Field:--

"As the electrician of the New York, Newfoundland and London Telegraph
Company, it is with the highest gratification that I have to apprise you
of the result of our experiments of this morning upon a single continuous
conductor of more than two thousand miles in extent, a distance, you will
perceive, sufficient to cross the Atlantic Ocean from Newfoundland to
Ireland.

"The admirable arrangements made at the Magnetic Telegraph office in Old
Broad Street for connecting ten subterranean gutta-percha insulated
conductors of over two hundred miles each, so as to give one continuous
length of more than two thousand miles, during the hours of the night
when the Telegraph is not commercially employed, furnished us the means
of conclusively settling by actual experiment the question of the