va PREFACE 



It is not impossible that some readers will 

 expect to find much that is absent from this 

 little book but it seemed better to utilise 

 the space at my disposal by devoting it to 

 matter not so generally discussed in a volume 

 of this size, than to attempt to say again what 

 has already been well done in other works of 

 this scope. 



In conclusion I wish to express my thanks 

 to Mr. Tabor and to Mr. Trowbridge for the 

 assistance they have kindly given me in the 

 preparation of nearly half the illustrations. 



J. B. F. 



Gerrard's Cro*s, 

 Feb. 20, 1913. 



