- Photobook (undated) with photographs of Moorish buildings in Andalusia (Cordoba, Granada, Seville). Folded in is a Program for the Inauguration of the architect Hendrik Elzinga for his 60th birthday (1937) and a letter of thanks from C.T.J. Rieber, secretary of the Society for the Advancement of Architecture, for expressions of interest in his 25th anniversary (1906).