PREFACE 



The Introduction to this book was written ir, 

 the year 1913. An explanation therefore be- 

 comes due, setting forth the reasons for so long 

 a delay in its publication. Perhaps the chief 

 cause has been the difficulty of finding an artist 

 with sufficient technical skill who could and 

 would undertake a task of such difficulty as the 

 hand-colouring of the large number of coloured 

 figures shown on the seventeen plates. 



The Author was particularly fortunate in 

 securing the services of Mr. Banfield, who 

 spared no pains in painting the original models 

 from which the figures have been copied. Then 

 the European war intervened, and Mr. Banfield 

 proceeded on service before the task had been 

 completed. 



Other delays arose by reason of the War : 

 still more, again, by reason of the Peace. In 

 these strenuous times, the difficulty of finding 

 colourists willing to devote the time required for 

 copying the minute details shown on the plates 

 has become more and more accentuated. 



Meanwhile, in March 1914, Frederic M. 

 Halford died, and the Author was deprived of 

 the immense advantage of his experience and 



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