«<^i ] Hudson's bay. 13 d d 



in 1879. On the return voyaji^e from Churchill, we visited a largo chain 

 of islands in the noith-eastern part of Hudson's Buy. which run north- 

 eastward between latitudes 59° and CO'^, terminating in that direction) 

 east of latitude 80". On some sketch-charts, a group of islands in this 

 part of the bay had been maiked " Sleepei-s," but as thei e are also two 

 other groups called Xurth Sleepers and South Sleepers, not far otf. Lieu- 

 tenant Gordon and I named these the Ottawa Iblands, in order to^hc ou 

 distinguish ihem clearly and to prevent confusion. Lieutenant (iordon ^*''"»<^' 

 made a lunning survey of the northern part of the chain, and we named 

 the individual islands in honor of the citizens of Ottawa who had 

 generously aided in missionary enterprise in Hudson's Bay. A copy of 

 Lieutenant (Jordon's chart of the Ottawa Islands accompanies this 

 report. The outermost of these shown on the chart, and called J. 

 Gordonlsland, consisted of thick, stratified masses, presenting a variety 

 of external appearances, and probably of volcanic origin, all dipping 

 westward at a moderate angle, as represented in the accompanying 

 outline of the island. 



aw& 



J. GoBDON Island from the North. / 



An opportunity was attbrded me of landing upon a small island lying 

 about two miles to the southwest of Gilmour Island (see chart) in lati- 

 tude 59° 48', longtitude 80' G'. It was found to consist entirely of a 

 greenish-grey diorite, which, on fresh fracture, is mottled with darker (jreenish-grey 

 and lighter shades. In a vertical section, found on the east side of the **'°"'®* 

 island, the diorite presents the "bouldery" or concretionary appear- 

 ance shown in tlie annexed sketch, the larger divisions having a diam- 

 eter of about two feet. The rock is cut by small veins of quartz, run- 

 ning in a northwesterly course (true) in which specks o^^^opper pyrites (j^pp^j.^^^^^^ 

 were detected. It also contains thin, short and iriegular veins of asbes- and asbostus. 

 tus and green epidote. Old weathered surfaces of the diorite are very 

 rough, but nearly the whole island bears the marks of glaciation. On 

 the southern and centi-al parts of the island the principal striro lun N. 

 <<)0° to 80° E., magnetically, or N. 20° to 40° E., astronomically, the 



