In the period 1958-63 Mr Maier was a lay missionary builder with the Divine Word Mission. When he took an interest in stone artifacts, Father Heinrich Aufenanger SVD, who later became Professor of Cultural Anthropology at Nanzan University in Japan, instructed him in how to document artifacts. Whilst in Chimbu Mr Maier collected 234 stone tools documenting them in detail, including photographs of the stone implements and the people who sold/gave them to Mr Maier.The collection was eventually sold to the Städtische Museum für Völkerkunde in Frankfurt. Some of the data sheets have been published by Carl A. Schmitz in 'Steinerne schalenmörser, pistille und vogelfiguren aus Zentral Neuguinea' in Baessler-Archiv, Neue Folge, Band XIV, in 1966, pages 1-60.

Data sheets Nos. 1-234 documenting transfers of Chimbu, Papua New Guinea, stone tools, including date, location, name of donor, description of artefact and its uses, in German (mainly), pidgin and English, including, on most data sheets, photograph of artefact and donor. Robin Hide commented that the datasheets are a nice window on the process of artefact collection by a lay missionary at that time (and why the Chimbu were so willing to dispose of them).