( 444 ) 

 No. LXIX. 



Supplement /o Mr . L a t r o b e 's Memoir, 



Readjan.TnHE following noticcs wcrc put into my hands, a 

 i8, 1799- X few years ago, by an ingenious friend* of mine. 

 They will, I think, form a very proper fupplement to Mr. 

 Latrobe's paper, lately communicated to the Society. 



Benjamin Smith Barton. 

 January i§th, 1799. 



*' T. The country below the Falls of James-River, in 

 Virginia, is evidently an acquifition through the recefs of 

 the fea. The mean diftance from thence to the fea is now 

 one hundred miles. For demonflrative evidence, fee the 

 gully in front of the eaftern door of the Capital, about 

 twenty feet below the level of its foundation, having the 

 appearance of blue clay, but on examination will be found 

 to be fea fand, containing fcolop, oyfter, clam, Englifli 

 cockle, and various other fhell-fifh in their natural pofition, 

 without any evidence of their removal by hand, univerfal 

 convulfion, or feparation of the upper and under fliell. See 

 alfo (the fame level perhaps) in the road between Mr. Sel- 

 den's and Mr. Banks's plantations defcending the hill to the 

 New Bridge, fix miles from the capitol, for the fame evi- 

 dence. 



" II. The wells of Dr. M'Clurg, W. Hay, Efq. and 

 Samuel Swan, all on fpurs of the fame hill, where the Ca- 

 pitol ftands, contain at a depth from 50 to 75 feet (being 

 many feet below the above-recited horizon) proofs of uni- 

 verfal convulfion, fuch as the bones of marine and terreftrial 

 animals, birds, fifhes, &c. with fome works of art, mixed 

 promifcuoufly in a blue fea-fand (of hepatic quality per- 

 haps). See the following Sedtion." 



Account 

 * Colonel William Tatlifli» 



