On -q Arg'ds and Nebula. Ill 



small nucleus or involved star at a. (The island) in sketch 

 appears brighter than in December (Le Sueur does not show 

 this star at all) and could not be missed by a casual observer, 

 and there is a general appearance of change going on which 

 I have not time to note to night." A close triplet of stars 

 very minute, and never before seen by any one, appeared in 

 mid-channel of lemniscate, and faint bridges between the 

 island to cape before mentioned and the island and margin 

 /S. /. also appear. 



On the Vjth June, the •' island" star appears in the new 

 channel between the island and the promontory to which it 

 lately belonged, and is noted as being for the first time 

 indubitably a star. These changes appear to indicate the 

 movement of the island away from the promontory and 

 towards the opposing capes. On 21st June, among other 

 minute changes, I note that the island is nearer the cape 

 than before observed ; but that the star is again becoming 

 obscured by nebula in new channel, and then proceed. 

 " The triplet N f -q shown by H. as double only, by 

 Le Sueur not at all, seems freer from nebula than before, 

 indeed may be said to be positively free from it : the new 

 star of the ' Orion 'is '>' / again, only apparent at 

 intervals." 



On the 22nd, " Opened up 5 p.m. on -q Argus with excel- 

 lent definition powers 230 and 520. Island appears hard 

 and defined at 8 f edge as before ; but 520 shows a narrow 

 channel between this and the main nebula, instead of bridge 

 before noted. Power 1300 shows this also more clearly, 

 and confirms beyond a doubt the existence of a bridge at 

 100" p and 60" N of -q. Many new stars appear also around 

 -q and elsewhere, -q quite involved in nebula, condensed in 

 neighbourhood of -q ; notch " in N f side of this net in 

 which the triplet shows clearly. The definition with power 

 1800 is magnificent, and I used it with great effect for an 

 hour." 



On the l7th June — I ought to mention — change had 

 proceeded, so far that I had. determined not to cdter sketch 4, 

 my first one, but to commence a neiv one ; which I accord- 

 ingly did, and commenced now to map (Sketch 5) every star 

 I saw in and around the lemniscate as well as the nebular 

 details. Besides the island now in mid-channel yet almost 

 touching either shore there exist at the period of this last 

 sketch — still incomplete — three instead of two areas of 

 condensation in the N p loop of the lemniscate, and the 



