The Latin designation _Stactum_, analogous to the Greek terms _Stacton_, _Enstacton_, and derived from the verb σταζω (I drop), denoted any liquid collyrium, applied by drops into the eye—“collyria enstacta, hoc est, instillatitia, appellata.”[474] A collyrium, with the appellation _Stactum_ or _Staticon_, is described by Marcellus,[475] Myrepsus,[476] Paulus Ægineta,[477] etc.; and Aetius[478] gives a chapter of collyria under this designation. In this chapter Aetius describes five collyria _Stactica_; and, of these, four contain the Opobalsam[479] as an ingredient, showing the origin and propriety of the term _Opobalsamatum_ in the inscription on the seal. Chishull read the last three letters of the inscription CAP, and thought that the oil was serviceable for head diseases. But if the inscription is not really CAL, the P has in all probability been substituted by an error of the engraver for L (CAL), an abbreviation for Caligines. In confirmation of this opinion, I may remark that the same inscription occurs at greater length on an oculist-stamp found at Daspich in France; and in it the _Stactum Opobalsamatum_ is professed to remove _Caligines_.[480] There is, indeed, little doubt but that Murranus of Colchester vended, of old, his Opobalsamic Eye-drops for the same alleged purpose. This quality of “visum acuens” is attributed to two out of the four forms of Opobalsamic Eye-drops mentioned by Aetius. And the _Stactum_ is (according at least to the testimony of Myrepsus) “ad acumen visus mirabile admodum.”—P. 660. SECTION VI. STAMP NO. V.—FOUND AT BATH. This stamp was found, in the year 1731, at Bath, a well-known Roman station. It was discovered in a cellar in the Abbey-yard. Shortly afterwards the stamp was exhibited to the Antiquarian Society of London by Mr. Cutler. Mr. Mitchell of Bristol, who possessed the stone about the middle of the last century, submitted it also for examination to the Royal Society of London. I have, through Mr. Norman of Bath, and other friends in England, attempted to trace out the present proprietor of the stamp, with a view of ascertaining more correctly the exact nature of the inscriptions upon it; but these efforts have been quite unsuccessful. Mr. Lethieullier presented to the London Antiquarian Society plaster casts of the inscriptions on the stamp; and three of these plaster impressions of it are still preserved in the London Antiquarian Museum. These plaster casts, however, are very imperfect; and the lettering upon them is now unfortunately defective at some of those very points that are otherwise the most difficult to decypher.