No 1504.
W. Ball à R. Moray.
novembre 1665.
Appendice II au No. 1502.
La copie se trouve à Leiden, coll. Huygens.
I also looked on ♃, and saw but 3. Satellites, supposing one of yem had been behind, but about an houre after, turning ye Glasse to him againe, I saw two Satellites, where I thought had been but one, wich I trouble you with, because I doe not remember the like among ye many, I haue seen.