Hemkosh is the second dictionary of Assamese language. The first Assamese dictionary was compiled by Dr. Miles Bronson, an American Baptist Missionary. His dictionary, published in 1867 at the American Baptist Mission Press, Sibsagar, is out of print. Bronson's work did not pretend to be an etymological dictionary but contained a very considerable collection of words from the people themselves without recording derivations.

Who compiled and publised the first assamese dictionary? Let's have some stream of consciousness first.
To answer this question, we should know that: The first Assamese dictionary was compiled by Dr. Miles Bronson, an American Baptist Missionary. So, the answer is Dr. Miles Bronson , an American Baptist Missionary.