178 APPENDIX. 



Some time afterwards, this fossil tooth was sent to him, with other specimens, all bearing the 

 marks of the locality. It was set aside, and was supposed by Dr. Ducatel to be the Longirostris. 

 Mr. Charlesworth, of London, Editor of the ' Magazine of Natural History,' came to Baltimore 

 subsequently, and it was shown him. He pronounced it at once not to be the Longirostris, but 

 identified it with the Mastodon of the crag of England, and wrote a memorandum expressing 

 his opinion ; and this was placed with the fossil. When Mr. Lyell came to our city, the tooth, 

 with Charlesworth's memorandum, was shown him by Dr. Ducatel ; but he expressed no opinion, 

 and made no remark. This is its history. Dr. Ducatel says there is no mistake in regard to 

 its locality ; the external surface, &c, bore all the marks of the formation from which it was said 



to have been taken I have felt mortified that I could not obtain the information from Dr. 



Ducatel a long time ago; he was desirous of sending you Mr. Charlesworth's memorandum, 

 and regrets with myself that he cannot find it." 



Jan. 21, 1S49. — " The result of my present inquiries, I am sorry to inform you, is that Dr. 

 Tilclen, to whom you had written, died some three or four years ago ; and we shall have therefore 

 to abandon all expectation of further information in regard to this fossil tooth. 



" Now, I can fully understand, from having been myself a student of natural history, and 

 knowing how easily false facts are mingled with the true, your desire to have the whole subject 

 re-investigated, and to have a renewed averment of the facts in connection with the fossil ; but 

 I fear we shall have to rest upon what is now stated ; and I must confess, notwithstanding the 

 anomaly of the matter, that I do not see how we can refrain from admitting them. Dr. t Duca- 

 tel himself, with whom I have again conferred, has not the slightest doubt on the subject. Besides 

 reiterating verbally all the circumstances, he writes me a note, stating : ' There can be no doubt 

 but that the fragment of the tooth, declared to be of the Mastodon Longirostris by Mr. Charles- 

 worth, of England, and afterwards recognized to be such by Sir Charles Lyell, was found in the 

 fossil deposit referred to the miocene period. It was rescued from the laborers engaged in 

 making diggings for marl in a locality which I had pointed out to them ; and sent to me by Dr. 

 Tilden, through his brother, Mr. Tilden, of Baltimore. Neither of them could have had any 

 other desire in handing me over the specimen than to oblige me. I was not aware myself of 

 the interest attached to the specimen, until Mr. Charlesworth pointed it out to me.' 



" You will remember that Dr. Ducatel was making his geological survey, and was in the 

 habit of indicating to the farmers and others such matters as would prove beneficial to them. 

 When at Dr. Tilden's, he pointed out a marl deposit, and told him to make his ' diggings ' at 

 this spot, and he requested Dr. Tilden (as he was always in the habit of doing on such occasions) 

 to send to him at Baltimore any large and perfect shells, fossils, or bones, &c, which his men 

 might turn up. The result was, as you have already been informed, that this tooth was sent to 



