1. MS Mus. 1813/2/1/20 Reference (shelfmark): MS Mus. 1813/2/1/20 Title: Theatres and Opera Houses, 1945–1947, part 2 of 3 Scope & Content: Dr. Ernst Roth's files, including: correspondence to or from the Theater Basel and the Royal Opera House. Collection Area: Music Collections Languages: English, French, and German Date Range: 1945-1947 Extent: 1 box (2 folders, 3 sub-files)
2. MS Mus. 1813/2/1/20/1 Reference (shelfmark): MS Mus. 1813/2/1/20/1 Title: Basel: Theater Basel Scope & Content: Correspondence to or from Theater Basel. This file was originally entitled 'Basel Opera' and held in a packet marked 'Roth Correspondence – Theatre & Opera Houses' 1 of 2 '. Collection Area: Music Collections Languages: English, French, and German Date Range: 1945-1947 Extent: 1 sub-file (3 parts)