some new data about Tredern, contained in a letter from 



K. M. Baer to the famous Russian teacher I. F. Krusenshtern. 3 



In his article about Tredern, Baer mentioned how in 

 1817 he was engaged in comparative anatomy with DOllinger 

 and assisted in the organization of Pander's embryological 

 studies. On becoming acquainted with the dissertation of the 

 Count Tredern, he was surprised by its thoroughness and 

 accuracy in observations and drawings. Being interested in 

 the personality of this investigator, Baer asked Do'llinger 

 about him and received the answer, "You know him; you know 

 that he is also from Estonia." Slightly surprised that he 

 did not know a fellow countryman, Baer decided that on 

 returning home he would get information. However, in Estonia 

 there was no trace of the Count Tredern. Doctor Vettershtrand, 

 working on the "Biographical Dictionary of the Activities 

 of Liflyandi, Estlyandi and Kurlyandi," could not tell anything 

 about Tredern, and explained only that some years before, when 

 the Russian fleet was stationed in Revel, a naval officer 

 lived there who had on his ship a brood hen and diligently 

 watched the growth of chickens. The people of Revel remembered 

 this strange naval officer, but nobody could remember his 

 name. This gave Baer his first clue. After that, the search 

 for Tredern yielded no results. In Petersburg, Baer wrote on 

 April 7 and June 24, 1836, two articles for the Prebaltic 

 newspaper DAS INLAND, 4 i n which a short account of 

 Tredern f s dissertation was given and its significance noted. 

 He expressed surprise that Count Tredern' s family had dis- 

 appeared in little Estonia without any trace, and that nobody 

 could remember anything about them. In the first of these 

 articles, Baer appealed to his fellow countrymen, especially 



M. M. Solovev,"Correspondence of the Academician K. M. Baer 

 with Admiral I. F. Krusenshtern. First Collection of the 

 Memoirs of Baer." Publications of the Academy of Science 

 USSR, 1927. pp. 10 - 59. 



K. E. v. Baer, "Bitte um eine Nachricht iiber die Litteratur- 

 geschichte unseres Vaterlandes, besonders an die jenigen 

 Herren gerichtet, welche in den Jahren 1806 - 1808 in Jena 

 oder Gttttingen studiert haben," DAS INLAND. EINE 

 WOCHENSCHRIFT Ft)R LIV-, ESTH- UND KURLANDISCHE 

 GESCHICHTE, GEOGRAPHIE, STATISTIK UND LITTERATUR 

 (1836), No. 15, pp. 253 - 256. "Wegen des Graf en von Tredern 

 zweite Auf forderung, " ibid. (1836), No. 23, pp. 391 - 392. 



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