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https://rylandscollections.com/2020/02/13/a-historians-reflections-on-seeing-the-invisible-medieval-hidden-heritage-revealed-john-rylands-library-30-october-2019-8-march-2020/
A historian’s reflections on Seeing the Invisible: Medieval Hidden Heritage Revealed (John Rylands Library, 30 October 2019–8 March 2020)