xviii PREFACE. 



geographical knowledge, but have, in times of peace, been 

 the best school for testing, by the severest trials, the skill 

 and endurance of many a brave seaman. In her hour of 

 need — should need arise — England knows that such men 

 will nobly do their duty. 



Roderick I. Murchison. 



November ; 1859. 



