11. Add MS 46819 Reference (shelfmark): Add MS 46819 Title: Scope & Content: Vol. XV (ff. 217). Celestial, territorial and architectural features. Collection Area: Western Manuscripts Languages: English Date Range: 16th century-20th century Extent: 1 item
12. Add MS 46820 Reference (shelfmark): Add MS 46820 Title: Scope & Content: Vol. XVI (ff. 171). Instruments and miscellaneous. Collection Area: Western Manuscripts Languages: English Date Range: 16th century-20th century Extent: 1 item