1841                Address Unknown, Batavia, New York.

Dr. Ganson is recorded in an announcement that appeared on August 17, 1841 in The Spirit of the Times (Batavia, New York).  Dr. Ganson, has recently introduced into our village, from N. York, an improved Daguerreotype apparatus.—We are authorized to say, when not otherwise engaged in his profession, Dr. G., would be happy to show its results, to any who may have the curiosity to call at his office and witness them.  The time required to take a likeness at mid-day, with a cloudless sky, is from twenty-five to fifty-five seconds.

Dr. Ganson is not recorded in other photographic directories.