The daily newspaper "El Siglo ilustrado" January 12, 1868, page 8 mentions in the largest ad by Francisco Gonzalez that he received an award in Paris at the Universal Exposition in 1867, and that he has in stock sheet music by concert guitarist, Julián Arcas, and other composers. Francisco is now in his second decade having guitar teachers available for lessons at his store, where they can buy strings, sheet music and guitars.
The daily newspaper "El Siglo ilustrado". February 2, 1868, page 8. mentions in an ad, now placed in one column, by Francisco Gonzalez that his store has a lot to offer, products and education.
In the next to the last paragraph it mentions he has two professors teaching at his store. This would be Antonio Cano (since October of 1857) and Tomas Damas (since May of 1865).
The daily Newspaper "La Correspondencia de España". November 22, 1871, no. 5,109, page 4. carried and ad for the educational activities at the Francisco Gonzalez guitar workshop.
Some 3 decades later in the "Fidelio" (Madrid). December 1, 1902, no. 1, page 4, is an ad for his son in law, who took over the business.