The intention of this paper is to stimulate discussion about future activities for the Working Group. Past activities, embodied in the reports of 1969 and 1972, are summarized. There are two aspects to the Group's activities: -- publication and materials involved. The publication aspect has concerned: inventories of collections; information on acquisition; replication of photographic material. The materials aspect may be subdivided: specimens from objects; photographic records; specimens of known materials; analytical standards; ancient materials.