PREFACE TO SECOND EDITION.


The unexpected amount of favour bestowed on the former edition of this
Work has been a great encouragement to the Editor in preparing this second
one.

Not a few of the kind friends and correspondents who lent their aid before
have continued it to the present revision. The contributions of Mr. A.
WYLIE of Shang-hai, whether as regards the amount of labour which they
must have cost him, or the value of the result, demand above all others a
grateful record here. Nor can I omit to name again with hearty
acknowledgment Signor Comm. G. BERCHET of Venice, the Rev. Dr. CALDWELL,
Colonel (now Major-General) R. MACLAGAN, R.E., Mr. D. HANBURY, F.R.S., Mr.
EDWARD THOMAS, F.R.S. (Corresponding Member of the Institute), and Mr. R.
H. MAJOR.

But besides these old names, not a few new ones claim my thanks.

The Baron F. VON RICHTHOFEN, now President of the Geographical Society of
Berlin, a traveller who not only has trodden many hundreds of miles in the
footsteps of our Marco, but has perhaps travelled over more of the
Interior of China than Marco ever did, and who carried to that survey high
scientific accomplishments of which the Venetian had not even a
rudimentary conception, has spontaneously opened his bountiful stores of
new knowledge in my behalf. Mr. NEY ELIAS, who in 1872 traversed and
mapped a line of upwards of 2000 miles through the almost unknown tracts
of Western Mongolia, from the Gate in the Great Wall at Kalghan to the