"This ill-fated woman being altogether an object of charity, her friends solicited me to take up her case, of which I was not at all sanguine. However, having previously perused, with much pleasure, a brief extract by Dr. Turnbull, on the fumes of prussic acid as a valuable remedy in certain diseases of the eye, I was led to make trial of a few applications of it in the above case, according to his method; and I must candidly confess, that ere long I was completely astonished on observing the rapid effect it produced on the opaque cornea before mentioned; more so, as the longer I cautiously and perseveringly used it, the greater in proportion did the inspissated lymph become absorbed, and the layers of the cornea, over a wide space, begin to assume their natural transparency, as also in dilating the pupil to a considerable extent; so much, indeed, that before one month under its use, she could observe objects in a very different light, and ere another had elapsed, she could find her way out of doors by herself, and come to my residence for any medicine she required; since which she has gone on gradually to progress favourably, without any more applications, and the vision is now sufficient to enable her to go about free from the dread she had before, or the use of a guide. "During the use of this potent remedy, it struck me very forcibly that the extract of belladonna might assist the case considerably (more especially when one had reasons for suspecting adhesions to exist), in keeping up a greater effect on the pupil than that arising from the use of the acid, which every one will admit at once, who has seen its powers depicted upon the human eye, to be only temporary, and, I believe, still less so in disease of the cornea and iris than in any other incident to such an organ. With such an object in view, and after once applying the extract, smeared round the eye, at bed-time, I soon found it to be also of considerable service, along with the daily use of the fumes of the acid, which were both, afterwards, employed assiduously in this manner, for the rest of the treatment.