This essay was written in 1908-1910 while I was studying at Oxford as Fellow of the Society of American Women in London. Material on the subject of travel in any century is apparently inexhaustible, and one could write many books on the subject without duplicating sources. The following aims no further than to describe one phase of Renaissance travel in clear and sharp outline, with sufficient illustration to embellish but not to clog the main ideas. In the preparation of this book I incurred many debts of gratitude. I would thank the staff of the Bodleian, especially Mr W.H.B. Somerset, for their kindness during the two years I was working in the library of Oxford University; and Dr Perlbach, Abteilungsdirektor of the Königliche Bibliothek at Berlin, who forwarded to me some helpful information concerning the early German books of instructions for travellers; and Professor Clark S. Northup, of Cornell University, for similar aid. To Mr George Whale I am indebted for the use of his transcript of Sloane MS. 1813, and to my friend Miss M.E. Marshall, of the Board of Trade, for the generous gift of her leisure hours in reading for me in the British Museum after the sea had divided me from that treasure-house of information.