With the exception of one project (i.e., 2.0.1), the Vorkink archive section consists solely of Vorkink construction drawings and correspondence from 1926 to about 1940.

The Wormser archive section contains material from the collaboration period of Vorkink and Wormser (from c. 1905 to c. 1925), as well as work by Wormser alone. The material from the collaboration period consists of drawings, a model, photographs, articles and brochures. The material related to Wormser alone consists of graphic work, sketchbooks, drawings, photographs and articles.

The archive section Wormser had already been globally inventoried and filed in folders at the NDB, but not quite chronologically. The construction drawings from the Vorkink archive section had already been arranged at the architectural office partly in rolls and partly in folders by project. The drawings were not always in chronological order. However, most were numbered. In addition, some projects possessed numbered drawing lists, which were pasted onto the folders. The correspondence of the Vorkink archive section had already been arranged by the bureau in boxes per project. The arrangement within the projects was not chronological; different subjects had their own cover with heading (e.g. : "Accounts", "Contractor", "Management", "Quotes", "Supervisor", "Installation", "Contracts", "Permits", "Budgets", etc.).

The collection of drawings and maquette of "'t Reigersnest," on loan from the Van Duin-Hudig family, was described upon its transfer to the NDB.

List of abbreviations used

Acute ac
Blueprint bd
Light printing ld
Idem colored ldk
Panel p
Passe partout pp
Drawing on paper tp
Idem coloured tpk
Drawing on transparent tt
Idem colored ttk
Woodcut hd
Idem colored hdk