JET. 60.] ADDRESS TO GEOLOGICAL SOCIETY. 233 



tered cab drove up to the door, bringing Mr and Mrs 

 Forbes, who had been carried past the junction at 

 Swanley on to Meopham, whence they had come over 

 the many miles of Chalk plateau and down the steep 

 escarpment to the Darent valley. There was no room, 

 alas ! for them for the night, as the house was full, so 

 they had to return to town. Not long after the gentle 

 Vanda Forbes was called away from her husband and 

 little children. He did not recover from the shock, 

 and the words of the late Dr P. Martin Duncan, the 

 writer of the Biographical Notice of David Forbes, to 

 the Geological Society, are of deep pathos : " He was 

 wounded in spirit by the loss of his wife, who was 

 singularly adapted to his tone of mind." 



The address which Prestwich gave to the Geological 

 Society at the Anniversary Meeting in 1872, the second 

 year of his Presidency, was on subjects of which he was 

 master. It was in two portions : the first, " Our Springs 

 and Water Supply," and the second half on " Our Coals 

 and Coal Supply." 



An Easter excursion was planned by him, as shown 

 in the following letter ; but, as it proved, he was unable 

 to join, and this particular expedition to the Boulogne 

 district was therefore postponed. 



J. Prestwich to J. Evans. 



LONDON, 19th March 1872. 



MY DEAR EVANS, If I go to Boulogne my plans are as follows. 

 We make that place our headquarters and visit 



1. Wissant and the coast on one side to Blanc Nez, and the 



other to Gris Nez. 



2. La Marquise, with the Oolites, Mountain Limestone, Coal- 



Measures, and Devonian rocks of the neighbourhood. 



3. The hills beyond Ferques, Guisnes (and its springs), and 



the Chalk hills around. 



