78/2458 [Mathematics]. With, T. de (18th cent.). "Cijffer Konst Getrokken uijt Willem Bartjens door Mijn Thomas de With". Manuscript tutorial, pen and ink on paper, (occas.) dated 1749-1752, (85) lvs. (all but a few) recto and verso, contemp. limp vellum w. "Desen Boeck Hoort toe Thomas de With", sm. 4to.

- Bookblock sl. warped; vellum wrinkled and sl. worn.

= Contains chapters on i.a. "Divisio in Gelden", "Reductio ofte Casse Rekeninge", "Regel van Drijen", "Multiplicatio/ Divisio in het Gebroken" and "Practijk ofte Korte Rekeninge", all neatly written in a well legible hand. Nothing could be traced on Thomas de With.