Problem: Locate papers comparable with watermark of a capped man with tailcoat (c.80 mm) holding club in raised right hand.
Search process: Using RIFM (assuming its existence), the keyword of the abbreviated description would be 'Man (c.80)', leading us to entries such as these:
The match is closer with Fig. 1.4, because of the raised right arm and ornamented frame. By then checking the location of the source of Fig. 1.4 ( Churchill, No. 759) we have a promising new channel for determining provenance and authentication.