1857 FAVOURITE MODE OF RECRUITING 207 



tramping from place to place did him no little good. 

 Thus, through the greater part of September and 

 October 1856 he ranged the coasts of the Bristol 

 Channel from Weston to Clovelly, and from Tenby 

 to Swansea, preparing a "Report on the Recent 

 Changes of Level in the Bristol Channel." "You 

 can't think," he writes from Braunton on October 3, 

 " how well I am, so long as I walk eight or ten miles 

 a day and don't work too much, but I find fifteen or 

 sixteen miles my limit for comfort." 



For many years after this his favourite mode of 

 recruiting from the results of a spell of overwork 

 was to take a short walking tour with a friend. In 

 April 1857 he is off for a week to Cromer; in 1860 

 he goes with Busk and Hooker for Christmas week 

 to Snowdon ; another time/^ie is manoeuvred off by 

 his wife and friends to Switzerland with Tyndall. 



In Switzerland he spent his summer holidays both 

 in 1856 and 1857, in the latter year examining the 

 glaciers with Tyndall scientifically, as well as seeking 

 pleasure by the ascent of Mont Blanc. As fruits of 

 this excursion were published late in the same year, 

 his "Letter to Mr. Tyndall on the Structure of 

 Glacier Ice" (Phil. Mag. xiv. 1857), and the paper 

 in the Philosophical Transactions of the Royal Society, 

 which appeared much against his will in the joint 

 names of himself and Tyndall. Of these he wrote in 

 1893 in answer to an inquiry on the subject : 



By the Observations on .Glaciers I imagine you refer 

 to a short paper published in Phil. Mag. that embodied 



