The word BIS denotes, in all probability, the frequency with which it was to be used daily. Occasionally the ancient authors state in the same way in their works the frequency with which a special collyrium was to be used. Thus, for example, Paulus Ægineta, after describing the composition of the brown collyrium (collyrium fuscum), adds that it is to be applied thrice a day (illinitur _ter_ in die ... ex ovo aut lacte, etc.)[546] Indeed when speaking of the variety of collyrium mentioned in the legend on this stamp,—namely, of the “collyria quæ quod ex myrrha constant διασμυρνα vocantur,” Actuarius expressly states that the affected eye is to be annointed with the _Diasmyrnes_ “twice a day (_bis_ in die).”[547] 3. The third side of this medicine-stamp is engraved, as already observed, by a different and far more inexperienced hand than the other two sides. The letters are very roughly and rudely formed. The inscription indicates the name of another oculist,—of one who probably became the possessor of the stamp after IVENIS. The new proprietor’s name is F., or probably FL., SECUNDUS, and the inscription reads, F. SEKUNDI AT ALBAS, _the collyrium_ or _preparation_ of _F. Secundus against Albugines_. In reading it, I suppose the AT to be a mis-spelling for AD,—a mistake of which there are not wanting other examples in the illiterate and careless engravings sometimes found upon these medicine-stamps.[548] And I have interpreted the ALBAS as signifying _albas cicatrices_ (white cicatrices), or, in other words, _albugines_ of the cornea,—a suggestion for which I am indebted to M. Sichel. Already I have quoted the expression of Aetius to the effect that all cicatrices of the cornea are “_Albæ_;” and the nouns by which such eye-cicatrices are designated, both by the Greek and Roman physicians, namely, λευκωμα and _albugo_, are words derived from, and intended to signify, the white colour (λευκος, _albus_) of these lesions. SECTION IX. STAMP NO. VIII.—FOUND AT SOUTHWELL. An anonymous correspondent, C. D., sent to the _Gentleman’s Magazine_, in 1772, a sketch and notice of what, no doubt, is a Roman medicine-stamp, but both the sketch given of it and the description are excessively meagre. The correspondent dates his letter from Southwell, in Nottinghamshire. He says, “The inscribed stone was found lately by casting up the ground, in the neighbourhood of Littleborough in this county. The stone is oblong, about two inches long, and one broad. It contains inscriptions on the edges or rim of the two ends, and on one of its oblong sides, but not on the other.”