Tratado del origen, y arte de escribir bien : ilustrado con veinte y cinco laminas : obra utilissima para que asi maestros, como discipulos,y quantos se hallaren estudiosos de escribir bien, puedan con facilidad aprender todas las formas de letras, que usamos en España modernas, y antiguas ... / su autor el R.P. Fr. Luis de Olod, bibliotecario del Real Convento de Santa Madrona de PP. Capuchinos de Barcelona.

First [10] p. consist of letterpress t.p. (verso blank), engraved dedication (verso blank), and [6] p. of letterpress preliminaries.
The [32] leaves consist of [20] engraved leaves of writing samples (versos blank) and [12] leaves of letterpress type specimens (versos blank).
Frontispiece port. of Olod, signed: Ioan. Petroschi inc. Romae.
All of the engravings are signed by Olod. Most are signed by the engraver, Giovanni Petroschi. One plate is signed: Frans. Boix Sculp. Bar[cino]ne. One plate dated 1760, another 1761.
Woodcuts: vignette on t.p., alphabet wheel (p. 40), tailpieces, initials.
Errata: p. [6] (1st count).
Text in double columns.
First edition, preceding the undated Gerona edition printed by Narciso Oliva. The same engravings appear in both editions. In the Barcelona edition, the engravings are present in less worn impressions, and the second writing sample appears in its first state, before the addition of horizontal ruling.