The first part consisted mainly of drawings, the second part of drawings, travel sketches and also written pieces. During the inventory of the first volume, a start had been made to organize the drawings by project. This method was continued for the second volume as well; i.e. all pieces: drawings, photographs, written documents and documentation were described per project as far as possible. Competitions have also been considered as projects. Conversions have been placed with the first design.The project descriptions consist of the following sections: *Dating of the documents found (in bold); *Description of the project (in italics); *Application numbers and a brief indication of the material found (drawings, photographs and other documents) *Eventual explanations.EXAMPLE1917-1918,Country house, located at Gooilandse weg 14 in Bussum,1927-1928with an alteration of the residential house.Application numbers:Drawings:58, 239-243Photographs:ph 4, ph 19-ph 20Other:59Explanatory notes:General:Concerns Hamers' own residence.Drawings:Refers to design sketches of the construction and remodeling and two blueprints.Photographs:Refers to a photograph on cardboard of a front and side view and a photograph of the interior of the living room, 1928.Other:Refers to notification of completion of a villa on the Gooilandsche weg, issued by the Municipality of Bussum, Department of Building and Housing Supervision, 1918.The projects are arranged chronologically. Not always the dating is known. If the dating could be determined through the use of secondary sources, or approximately, the years have been placed in square brackets, e.g. [1940]. Additional information that is not from the archives is also in square brackets.The project files are not always complete. The request numbers show whether the material belongs to the first or second acquisition. Application numbers up to 200 have been assigned to the first section, and those from 201 onward to the second.The project-related documents make up the bulk of the archive. In addition, non-project related pieces were found: training materials, travel sketches, portraits and other free work. The travel sketches are particularly interesting and show Hamers' talent for drawing. The travel sketches are also arranged chronologically and then by travel destination, with the exception of two series found; these series have been left intact and contain material from several countries. The first series (application no. 651-674) consists of a loose-leaf set of drawings and documentation on church construction, the second series (application no. 608-614) consists of watercolors, which were presumably exhibited.The headings general, inventions, interference with the traffic situation in the Gooi and the heading documentation complete the archive.On a number of drawings it is mentioned that Hamers collaborated with other architects, these are: A. Baljeu, P.S. Dijkstra, N. Lansdorp, K. Muller, F.G.C. Rothuizen, Vorkink and Wormser, and H.Th. Wijdeveld. In 1920 Hamers, together with Baljeu, ran a construction agency for Zeeland in Middelburg.Most of the photographs of Hamers' work were taken by C.A. Deul (Hilversum) and by photo agency Stevens (Haarlem-Hilversum).