Below are resources about Hopkins that might be helpful
USA.gov earch http://search.usa.gov/search?utf8=%E2%9C%93&affiliate=usagov&query=thomas+hopkins+deaf+education
Gallaudet University: Widening Horizons for the Deaf - scroll down for history https://publications.america.gov/publication/gallaudet-university-widening-horizons-deaf-american-institutions-series/#axzz3RTYt8CmE
Thomas Hopkins Gallaudet on Language and Communication: A Reassessment. by Fernandes, James J. American Annals of the Deaf, v128 n4 p467-73 Aug 1983 Materials written by T. H. Gallaudet on the subject of sign language and communication are reviewed that indicate that some of his ideas regarding the use of sign language in teaching deaf students may have been partially misunderstood. (Author/SW) ERIC Number: EJ288256 CT State Library's subscription doesn't go this far
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