Analysis of information sources in references of the Wikipedia article "Crane Currency" in English language version.
[A]t the age of thirteen years [he] became an apprentice of a local millwright. In 1846 he was employed on work being done in connection with the rebuilding of the old Red Mill, erected at Dalton...by Zenas Crane...Among the mills designed by Mr. Tower are the four Crane paper mills at Dalton, in which all the money paper for the United States Government has been made for over forty years.
[A]t the age of thirteen years [he] became an apprentice of a local millwright. In 1846 he was employed on work being done in connection with the rebuilding of the old Red Mill, erected at Dalton...by Zenas Crane...Among the mills designed by Mr. Tower are the four Crane paper mills at Dalton, in which all the money paper for the United States Government has been made for over forty years.