96 ENGLISH MEN OF SCIENCE. [chai*. 
professional engagements, but more often from 
myself.” 
40. “ Considerable power in earlier days of en¬ 
during mental fatigue and of taking up without 
difficulty a considerable range of subjects. Ex¬ 
ample :—I was for a little while, æt. seventeen to 
twenty, employed in teaching, and I contrived in 
my scanty intervals of leisure to read a very large 
quantity of Greek and Latin, and to become, 
without any external assistance, a very fair 
mathematician [my correspondent occupies a high 
official position, in which considerable mathe¬ 
matical knowledge is essential]. I learnt also 
Italian at this time.” 
41. “I should say considerable, judging by the 
number of things I have been able to learn and 
to do since adult age.” 
42. “I think considerable, in mind. Have 
commonly had it said of me that it was wonderful 
how I got through so much work. 
Father—Was well known as a hard-worker. 
Mother—A great reader ; taught herself Greek