The enclosed advertisement was probably that printed in the New York Commercial Advertiser from 12 to 20 June 1820 under the title “Mutual Teaching of Languages, and of the Mechanical Arts. Foreign Book store, Library, etc.” It reads “F. De Gelone, No. 30 Pine-street, New-York, invites his friends and the public to visit his apparatus, which is calculated to teach a language and the liberal arts to the Deaf and Dumb. The Latin, French and Spanish tongues are indispensable to Gentlemen. The French is spoken in all the Courts and by the trading class in Europe—treaties were written in that language for centuries past. This method of Teaching, which was imitated from the formal plan by Lancaster and Bell, extends to the study of Mathematics.—It may be applied to the practice of the Fine Arts, such as Drawing, Statuary, Sculpture, Engraving, and to that of the Mechanical Arts, as Turning, Carpentry, Joinery, Forging, Dorimartics, etc. Any sort of instruments shall be thankfully received, as they are for the use of the Poor.—Each utensil presented, shall be marked City of New-York, and will be, of course, considered as its property. Two poor boys of 10 years of age, shall be taught without any compensation. As there is a lady in the house, two young girls may also apply.” “Dorimartics” is probably a typographical error for “Docimastics,” a variant of “docimasy,” the “art or practice of assaying metallic ores” (OED description begins James A. H. Murray, J. A. Simpson, E. S. C. Weiner, and others, eds., The Oxford English Dictionary, 2d ed., 1989, 20 vols. description ends ).