cuAP. I. BON PEDRO 3IALD0NAD0. 17 



Amazons, and assisted in the survey of that river, and then 

 proceeded to Europe to introduce his mqw way from Panama to 

 Quito to notice in Si3ain. He went to Paris to superintend the 

 production of his map ; and, after other travels, came to London, 

 and died there of fever on Nov. 17, 1748, aged about forty 

 years. He had been elected a Corresponding Member of the 

 French Academy of Sciences, and at the time of his death was 

 about to be proposed at the Royal Society. 



In constructing the Route Map which accompanies and 

 illustrates this volume I have put the maps of La Oondamine 

 and Maldonado entirely on one side, and have commenced afresh. 

 I have used the Latitudes of La Oondamine for Quito and 

 Riobamba, and have adopted 70° 52' 27" W. as the Longitude 

 of Guayaquil. The details have been tilled in from my own 

 observations (principally angles taken with a transit theodolite) 

 except such courses of rivers as are given in dotted lines. 

 Many of my names will not be found in earlier maps, and in 

 the positions both of towns and mountains I frequently differ 

 from my predecessors. As nearly every town, village or inn is 

 given on the route from Guayaquil to Quito, this route ma]) 

 may be found of some service by persons travelling between the 

 coast and the capital. 



The Map of Chimborazo has been constructed from my own 

 observations by Mr. Turnbull under Mr. Bolton's direction at 

 Stanford's Geographical Establishment. Its scale depends upon 

 a measurement made on the Quito road, between Chuquipoquio 

 and Mocha. 



The Plan of the Glacier de Debris on Chimborazo has been 

 constructed by myself from my own observations, and its scale 

 depends upon a base of GOO feet which I measured below our 

 Second Camp, upon the western side of the glacier. 



I have thought it desirable for the further illustration of my 

 narrative, and for comparison, to give in fac-simile the central 

 portion of the Maldonado map. This has been reproduced from 



D 



