had paffed between him and other learned men on that 
fub;ed:. 
But he had further defired (for the greater fatisfa- 
d:ion of: all) that feme one or other might come over 
to him, from the l^yal Society, ("well acquainted with 
the Method of obferving by Telefcopick Sights ,) who 
might ('upon his own view of the Authors Inftruments 
and manner of obferving, and by comparing thofe with 
his^ fatisfy himfelfs and report to the Society^ for their 
fatisfadion , what himfelf by experience fhould find 
true i, and whether there were indeed fuch caufe of com- 
plamt aswhatMr. had made. 
Agreeably to this defire of his ('which he recounts as a 
great happinefsjMr. Edmund /^^^^a Member of the l^yal 
Society, who had a very good opinion of Telefcopick Sights^ 
and was himfelf accuftomed to ufe them, and had (a 
while before) made a Voyage to the IJle of S\ Helens^ 
and there (with fuch) made obfervations of the Fixed 
Stars in the Southern Hemifphere, (many of which are 
tons unfeen, ) whereof he had then lately publiflied an 
account in Print,- did, from the J{oyal Society, arrive at 
Dant[ic\,May 26. 1(^79. and there continued, with the 
Author, till July. 18. and was all that timeaconftant 
attendant at his obfervations; and had with him (of his 
own) a very good Inftrument furniflied with Telefcopick^^ 
Sights*, the better to compare thereby the one and the 
other way ofobfervation. 
The fame day that Mr. Hally atnvt^fMay 16. 167^) 
he did, in Mr. Hally s prefence (as a fpecimen of his 
manner of obferving and the accuratenefs thereof) take 
(with his large brals Sextant) the Diftance of l{egulus 
and Spica ; (Mr. Hally having fo defired, as doubting 
whether he could, in his prelence, determine to a mi- 
nute, the fame diftance which he might have poffibly^ 
fome time before, obferved ; ) Which (notwithftand- 
ing the difadvantage of the light Summer-nights, and 
E e e the 
