H.L. van Hooff (first half 19th century). Two works: (1) "Rekenboek

van H.L. van Hooff begonnen 19 van Herfstmaand 1810" to "Rekenboek (...) begonnen den 20ste van Bloeimaand 1812". Manuscript with various arithmetic books with consecutive pagination, 224 p., with numerous neatly finished arithmetical problems, original half sheepskin with morocco letterpiece, 4to.

Foxing from several paperclips, one of which holds a "Bewijs van Vlijt voor de Maand November 8 Notten" for our industrious arithmetician; (2) "Cours d'Arithmétique de Mr. van der Meeren travaillé par H.L. van Hooff. 1814". Manuscript of (2),77 leaves written on one side and 78-191 pages written on both sides followed by more than 100 blank leaves (Pro Patria "I.B. & Z." water mark), original half calf with morocco letterpiece, 4to (total 2).