Up to February, 1840, but few friends had been made acquainted with the progress of the art in the hands of Mr.Wolcott and myself.

From time to time reports reached us from various sources of the success of others, and specimens of landscapes, etc., were exhibited at Dr.James R.Chilton's laboratory, in Broadway, much to the gratification of the numerous visitors and anxious expectants for this most wonderful discovery.

Dr.Chilton, Professor J.J.Mapes, Professor J.W.

Draper.
Professor S.F.B.Morse, all of this city; Mr.Cornelius, Dr.Goddard and others of Philadelphia; Mr.Southworth, Professor Plumbe, and numerous others were early in the field; all, however, using the same description of camera as that of Daguerre, with modification for light, either by enlargement by lens and aperture for light, or by shortening the focal distance.
At a conversational meeting of the Mechanics' Institute, Professor J.
J.Mapes being present, a question was asked if any one present could give information relative to portraiture from life by the Daguerreotype.

Mr.Kells, a friend of Mr.Wolcott and a scientific and practical man (since deceased), at once marked out upon the black-board, the whole as contrived by Mr.Wolcott.