they were finished, a few at a time, and the text broken up. If the errors and repetitions are numerous they may in charity be ascribed to this unorthodox procedure, and such errors would have doubtless been altogether avoided if we could have submitted the proofs in their entirety to any of the numerous friends who have from time to time given us advice and assistance. From Sir Clements Markham and Dr. Keltie of the Royal Geographical Society wise counsel and kindly help to travellers seems to flow in a perennial stream; and in this connection I would gladly pay my tribute to the memory of one who was beloved by all travellers, the late Secretary of the Society, Henry Bates, who, after my return from my earlier journeys, was almost alone in offering encouragement, pointing out to me the importance of the work which seemed to have fallen to my lot to undertake. My friend, Mr. Francis Sarg. for many years Imperial German Consul at Guatemala City, to whose ready help and never-failing hospitality the success of my earlier journeys was largely due, has added to the long list of his thoughtful acts of kindness by making many valuable suggestions and by saving us from many errors, especially in our descriptions of the Indians and their customs. Of my obligation to Mr. DuCane Godman, the editor of the 'Biologia Centrali-Americana,' it is not easy for me to speak in measured terms; and as he would be the first to deprecate the only expressions by means of which adequate thanks could be tendered to him, I must here content myself with assuring him of my gratitude for allowing me to reproduce the reduced copies of certain maps, plans, photographs, and drawings which have already appeared, or are about to be issued, in the Archaeological section of the 'Biologia.'
The greatest pleasure which the completion of this volume could have afforded to my wife and myself has, alas! been denied to us: we cannot place a copy of it in the hands of Osbert Salvin. What loss science has suffered by his death it is not for me to say; but how great the loss is to his friends I have good reason to know, for to his enduring patience, his never-failing sympathy, his sound advice, and affectionate friendship I owe more than I can here express. In the preparation of this volume, about the land he knew so well and with which his name must ever be associated, he took such
