PREFACE TO FIRST EDITION. 



and Mr. J. C. Moore, F.R.S., who have rendered me very 

 material and valuable assistance. I am also much indebted 

 to the Rev. R. M. Luckock, of the Godolphin Grammar 

 School, who read the whole work in manuscript, with a view 

 to pointing out any portions which might be unintelligible 

 to schoolboys. 



LONDON, December 1875. 



