110 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
ITINERARY. — June 4th, 1900, Flagstaff northward to Stokes spring, 
at northwest base of San Francisco mountain; dth, northward to 
the Coconino forest, within four miles of Hance’s on the canyon rim ; 
6th, descended from Cameron and Berry’s Hotel by Grand View trail 
into canyon and spent the night at the level of the lower Tonto shales ; 
7th, returned to Cameron and Berry’s ; 8th, southward to Hull’s spring 
on road to Flagstaff; 9th, northeastward to Little Colorado river at 
crossing of road from Flagstaff to Tuba; 10th, northward to Tuba; 
llth, northward along base of Echo cliffs to Cottonwood tanks; 12th, 
still northward along Echo cliffs to Tanner’s tanks ; 13th, still north- 
ward along Echo cliffs, crossing the Colorado river at Lee’s Ferry ; 
14th, southwest to Jacob’s pools under the Vermilion cliffs of the 
Paria plateau; 15th, west to Jacob’s lake on the Kaibab plateau , 
16th, northwest to Fredonia; 17th, westward to Pipe spring and 
southwestward to Yellowstone spring near Antelope valley; 18th, 
southwestward to Trumbull spring at southern base of Mt. Trum- 
bull;? 19th, ascended Mt. Trumbull, then southward to Oak spring ; 
20th, southward to Vulcan’s throne in the Toroweap, and back to Oak 
spring ; 21st, northward to Clay holes; 22nd, northward to Gould’s 
(Workman’s) spring; 23rd, northward past Toquerville to Kelsey's 
ranch ; 24th, northward past Cedar City to Rush lake; 25th, north- 
west to Minersville; 26th, northwest to Milford; night train to Salt 
Lake City. 
Summary or Previous Work.— An account of new observations 
made in such a district as that of the Grand Canyon of the Colorado, 
already well studied by the explorers of our western surveys, naturally 
lays more emphasis on novel interpretations of former observations or 
on subordinate matters newly observed, than on the great structural 
features of the region or on the principal events of its history. But 
whatever of novelty is now to be gleaned in that marvellous region must 
rest so immediately on the work that has been already done there that 
I wish at the outset to express the great indebtedness that all of our 
party felt to the pioneer work of Newberry, Powell, Gilbert, Dutton, 
and Holmes, whose labors have transformed a desert wilderness into 
classic ground for the geologist, and whose reports are quoted whenever 
it is desired to illustrate all that is marvellous in the way of displace- 
1 Trumbull spring is on the slope of the mountain several hundred feet above 
its base: at the time of our visit it gave very little water. The place is not to be 
recommended as a camping ground. Oak spring, four miles further south, is 
much better. 
