W.J. Holland, Ph.D., LL.D, Director Carnegie Museum, Pittsburgh, Pa. Dear Sir:- I am in receipt of your very courteous letter of yesterday, in which you are so kind as to ask me, to put you in communication with the proper authorities of the Museum in my country, to which is destined the splendid Diplodocus that Mr. Carnegie has presented as a gift to our coutry, at the request of the President Doctor Saenz Pena. The name and address of the Director of the National Museum of La Plata, is: Doctor Samuel A. Lafone Quevedo, Museo Nacional de La Plata, La Plata (Argentina Republic)