I therefore, gladly and thankfully, accepted Miss AMY FRANCIS YULE'S kind
proposal to undertake the editorship of the third edition of the _Book of
Ser Marco Polo_, and I wish to express here my gratitude to her for the
great honour she has thus done me.[1]

Unfortunately for his successor, Sir Henry Yule, evidently trusting to his
own good memory, left but few notes. These are contained in an interleaved
copy obligingly placed at my disposal by Miss Yule, but I luckily found
assistance from various other quarters. The following works have proved of
the greatest assistance to me:--The articles of General HOUTUM-SCHINDLER
in the _Journal of the Royal Asiatic Society_, and the excellent books of
Lord CURZON and of Major P. MOLESWORTH SYKES on Persia, M. GRENARD'S
account of DUTREUIL DE RHINS' Mission to Central Asia, BRETSCHNEIDER'S and
PALLADIUS' remarkable papers on Mediaeval Travellers and Geography, and
above all, the valuable books of the Hon. W. W. ROCKHILL on Tibet and
Rubruck, to which the distinguished diplomatist, traveller, and scholar
kindly added a list of notes of the greatest importance to me, for which I
offer him my hearty thanks.

My thanks are also due to H.H. Prince ROLAND BONAPARTE, who kindly gave me
permission to reproduce some of the plates of his _Recueil de Documents de
l'Epoque Mongole_, to M. LÉOPOLD DELISLE, the learned Principal Librarian
of the Bibliothèque Nationale, who gave me the opportunity to study the
inventory made after the death of the Doge Marino Faliero, to the Count de
SEMALLÉ, formerly French Chargé d'Affaires at Peking, who gave me for
reproduction a number of photographs from his valuable personal
collection, and last, not least, my old friend Comm. NICOLÒ BAROZZI, who
continued to lend me the assistance which he had formerly rendered to Sir
Henry Yule at Venice.