xiv The Trees of Great Britain and Ireland 



the descriptions and identifications were made can be referred to in case of 

 doubt. 



It is impossible to acknowledge in full detail the help that we have received 

 from landowners and their agents, foresters, gardeners, and friends in all parts of 

 Great Britain which we have visited during the course of the work ; but we have 

 felt on many occasions that without this help the work would have been impossible. 



Amongst those to whom we are most indebted for help, I must especially 

 mention the following : 



Sir William T. Thiselton-Dyer, F.R.S., who has carefully read the proofs of 

 all the volumes except the first, and whose suggestions and advice we have followed 

 in many difficult questions ; Mr. Charles Palmer of Stewkley Grange and Man- 

 chester, who has also read the proofs with extraordinary care ; the Director and 

 staff of the Royal Gardens at Kew, who from first to last have shown a personal 

 interest in our work which has been of the greatest support and assistance. We 

 must here call attention to the fact that the collection of living trees at Kew is, 

 and we hope always will be, so far as its soil and climate will allow, the most 

 complete, correctly named, and well -cared -for in Europe ; while its unrivalled 

 library and herbarium, where much of our work has been prepared, and the 

 references checked, have been indispensable in connection with the living 

 specimens. 



The staff of the Botanical Department of the British Museum of Natural 

 History, as well as the Directors of the Botanical Gardens at Edinburgh, Glasnevin, 

 Oxford, and Cambridge have afforded us every facility for studying both the trees 

 and herbaria in their charge, and we gratefully acknowledge their assistance. 



In the United States we have received much help from the officials of the 

 National Bureau of Forestry, and from many private individuals, amongst whom I 

 must mention Prof. Elrod of the Montana University, Mr. Gifford Pinchot, the late 

 Chief Forester of the United States, and especially Mr. Charles S. Sargent of the 

 Arnold Arboretum, who has given us much valuable information and help on 

 many occasions. 



In Canada Messrs. J. M, and W. T. Macoun of Ottawa have been on many 

 occasions most helpful and obliging. 



In France we have to thank numerous friends for shewing us many of the 

 finest trees and forests in all parts of the country ; amongst them we are especially 

 grateful to MM. Maurice and Philippe de Vilmorin of Paris, Prof. Flahault of Mont- 

 pellier, M. Leon Pard^, Inspecteur des Eaux et Forets of Beauvais, M. Hickel of 

 Versailles, M. Guinier of Nancy, M. Jouin of Plantieres near Metz, and Mr. Cecil 

 Hanbury of La Mortola in Italy. 



In Holland Mr. L. A. Springer of Haarlem, in Belgium Prof. Bommer of 

 Brussels, M. Huberty, Inspector of Forests, Verviers, and the late Baron de Selys- 

 Longchamps, in Germany the late Herr Spath of Berlin and the late Prof. Blasius of 

 Brunswick, and the Directors of the Botanic Gardens we have visited in Germany, 

 Russia, Italy, Sweden, Norway, Spain and Portugal, Bulgaria, and Servia, have all 

 given us most valuable notes and assistance. ' 



