Catalogus van twee verzamelingen boeken: 1°: Drie theol. bibliotheken o.a. de boeken nagelaten door ... Ds. P. van Borssum Waalkes te IJsbrechtum, 2°: eene uitgebreide ... verzameling wiskundige e.a. werken: de verkooping hiervan zal plaats hebben ... October 1881 ... door ... P.L. Folmer, boekhandelaar ...

This catalog was printed in 1881 to facilitate the public auction of two distinct private libraries in the Netherlands. The first collection comprised theological works, notably those bequeathed by Ds. P. van Borssum Waalkes of IJsbrechtum, a figure within the Dutch Reformed tradition whose library reflected the clerical and academic interests of the era. The second collection focused on a broad range of mathematical and scientific treatises, demonstrating the period's growing interest in technical and empirical literature.

The auction was managed by P.L. Folmer, a bookseller based in Groningen who frequently curated such sales to disperse private holdings into the broader scholarly market. Like many catalogs of its time, this document served as both a practical inventory for prospective bidders and a historical record of private intellectual pursuits in nineteenth-century Friesland. Its design is typical of late-Victorian Dutch trade ephemera, prioritizing clear, utilitarian typography to categorize diverse subjects for specialized collectors and institutions.