The fonds was created by the donor himself. His donated material was divided into different fonds and collections in accordance with specifications he himself provided. This particular fonds consists primarily of a typeset of Batcheldor’s “Macro-PK in Group Sittings: Theoretical and Practical Aspects”, as well as a brief biographical description created by Walter Meyer zu Erpen, the donator, and a DVD containing a digitized version of the typeset.