1. MS Mus. 1813/2/1/150/6 Reference (shelfmark): MS Mus. 1813/2/1/150/6 Title: Mechanical Rights Society Scope & Content: Correspondence of around 1961 relating to the Mechanical Rights Society Ltd. This file was originally entitled 'M.C.P.S. – 1961' and held in a packet marked 'Dr Roth – E-M – General – 1961'. Collection Area: Music Collections Languages: English Date Range: 1961 Extent: 1 sub-file