Playing hymns is an essential part of the musical lives of most organists.  The hymn is a resilient art form, and has survived into the twenty-first century, with twenty-first century resources to match: here's a guide to some of them.   The Hymn Society The Hymn Society of Great Britain and Ireland is proud that its aims, established in 1936, are still being carried out, but via modern communication methods, and for anyone who sings, chooses, writes or plays hymns, their excellent website is a mine of useful information and downloads.  Look out for their short guides on choosing…