XtOL. XLIII.] PHILOSOPHICAL TRANSACTIONS. 97 



bantes are placed by Mr. Camden in Middlesex and Essex, and the rest in the 

 neighbouring counties on each side the Thames ; the Segontiaci particularly in 

 the north part of Hampshire, in Holeshot hundred. And he rightly takes Vin- 

 domum or Vindomis, as it is called by Antonine, now Silchester, to have been 

 their principal town. But though Dr. Gale agrees with Camden in making 

 Silchester the same as the ancient Vindomis ; yet he thinks that town did not 

 belong to the Segontiaci. Mr. Horsley differs from them both ; and neither 

 admits Silchester to be the ancient Vindomis, nor to lie within the bounds of the 

 Segontiaci ; but takes it for Calleva Atrebatum, mentioned likewise in the Itine- 

 rary. From the difficulty therefore of fixing the situation of the Segontiaci, Dr. 

 Clark contents himself with only placing the word incertum against their name. 

 But had this short inscription, imperfect as it is, offered itself to these learned 

 writers, none of them could have been at any further doubt, either in placing 

 Vindomis, and not Calleva, which belonged to the Atrebates, where Silchester 

 now stands ; or including this town within the limits of the Segontiaci. The 

 want thereof has likewise occasioned them no less to differ in settling some other 

 neighbouring stations, which by this help might have been fixed with much more 

 agreement and certainty. 



The Case of one Hannah Hitchcock, one of whose Ureters was grown up ; also a 

 Present of a beautiful Stalactites; and a Drawing of an Extraordinary Calcu- 

 lus taken out of the Bladder of a Boy. By John Huxham, M.D.,F.R.S. 

 N°474, p. 207. 



Dr. H. here states that he had sent the case of Hannah Hitchcock with a box 

 containing the stones, &c. That in the same box he had also sent a remarkable 

 specimen of stalactites, which was found in a cavern, discovered amidst the vast 

 marble rocks at Cat-down near Plymouth. It hung perpendicularly from the 

 top of the rocky cavern, and was a cylindrical tube of 20 inches long at least, and 

 quite hollow, but was unluckily broken into several pieces in bringing it away. 

 He went to the cave the next day, and found 5 or 6 of such kind of tubes, but 

 none above 1 inches long. They all sprang from a broad, hollow, protuberating 

 basis, in some sort as a nipple arises from the breast. These also were cylindrical 

 and hollow. There were in the same cavern many other petrifications, which 

 had formed a kind of hollow pilasters against its sides ; and also several large 

 solid masses, which arose from the continual dropping of the petrifying water 

 through the crevices of the superior rock. These all afford a very good alabaster. 



The box contained an exact draught of a stone, fig. 4, pi. 2, which had been 

 taken out of the bladder of a boy, about 1 2 years old ; it was of an uncommon 

 figure ; though not indeed so very remarkable as that mentioned in the Philos. 

 Trans. N" 430. The boy died 2 or 3 days after the operation. 



