Geological Society, 205 



south ; and the self-importance of his voyageurs, who had thus 

 happily completed a journey of 3600 miles, was conspicuous in 

 their gala attire and gay chansons as the landing was approached." 

 On the approach of spring the journey was resumed by way of 

 Great Slave Lake to Fort Simpson on the Mackenzie River. At 

 daybreak on March 28 the temperature sank as low as —41° F., 

 and from the next day to May 25 Lieut. Letroy remained at the 

 Fort, awaiting the break-up of the ice, when the boats started for 

 Fort Good Hope, lat. 66 s 16' X., long. 12- c 31' W. The return to 

 Lake Athabasca (30th June) was by the same route, but from 

 thence a detour was made up the Peace Eiver to Fort Dunvegan, and 

 by the Lesser Slave Lake, to Edmonton, from which point the Eiver 

 Saskatchewan was descended to Cumberland Harbour, reached on 

 August 29. L^seful Tables, Charts, and an Index complete the 

 volume. 



These records of field-work patiently and perseveringly carried 

 out (a kind of work comparable in the labour involved with that of 

 the Geodesic or Geological Surveyor in a new country) are not, of 

 course, light reading, but are sufficiently interspersed with entries 

 of difficulties encountered and overcome, risks run, physical and 

 other features of the route observed, to impart much general 

 interest to the narrative. The name of the author will now be 

 inseparably associated with the few who have devoted themselves 

 to build up the existing store of knowledge on the subject which 

 has been secured for Science ; while 4i Mount Lefroy,"' round the 

 N.W. slopes of which the Canadian Pacific Railway will wind, 

 when completed, will worthily perpetuate that name on the scene 

 of those labours : "JEtemumque locus . . . nomen habehit." 



XXY. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 

 [Continued from p. 74.] 



May 27, 1885.— Prof. T. G. Bonney, D.Sc, LL.D., F.R.S., 

 President, in the Chair. 

 npHE following communications were read : — 

 -*- 1. " On the so-called Diorite of Little Knott (Cumberland), with 

 further Remarks on the Occurrence of Picrites in Wales. 7 ' Bv Prof. 

 T. G. Bonney, D.Sc, LL.D., F.E.S., Pres. G.S. 



The Little Knott rock and its microscopic structure were briefly 

 described by the late Mr. Clifton Ward, who named it a diorite, but 

 called attention to its abnormal character. The author gave some 

 additional particulars, and showed that although the rock varies in 

 different parts of the same outcrop, and is not one of the most 

 typical representatives of the picrite group, its relations on the 

 whole are with this rather than with the true diorites. He also 

 called attention to the extraordinary number of boulders which have 

 been furnished by this comparatively small outcrop, and discussed 

 the relation of their distribution to the former extension and effects 



