According to another opinion with which I have been favoured, the first monogram is a NOTA BENE; the next group may mean DIES MERCURII (Wednesday) 26TH JANUARY, 1603; and the rest refers to something not connected with astronomy. But to this also there is a serious objection. The 26th of January, 1603-4, was a Friday, and it seems to me very improbable that any Englishman would have described the preceding January as belonging to the year 1603. Bacon himself invariably dated according to the civil year, and the occasional use of the historical year in loose memoranda would have involved all his dates in confusion. I should think it more probable that the writer (who may have been copying a kind of notation with which he was not familiar) miscopied the sign of Venus into that of Mercury; in which case it would mean Friday, 26th January, 1603-4. But even then the explanation would he unsatisfactory, as leaving so much unexplained. Those however who are familiar with old manuscripts relating to such subjects may probably be able to interpret the whole.