Letter, 3 December 1922, Czechoslovakia, Johannes and Julia Rontgen to Mary Grierson. Describing their new environment, and Johannes new job to Grierson. Holograph signed.

Letter, 30 March 1922, Amsterdam, Johannes Rontgen to Mary Grierson. expressing delight at news of Miss. Weisse's travels, suggesting he meet up with the Rontgens' in Holland, describing memories of Edinburgh, asking Miss. Weisse about the Reid orchestra, suggesting Bartock is the best modern composer living, and best wishes. Holograph signed.

Letter, 16 July 1922, Johannes Rontgen to Mary Grierson. Informing Mary Grierson that the Rontgen's will not be coming to Edinburgh since Johannes has accepted a conducting post and news of his wedding. Holograph signed.

Letter, 19 March 1924, Amsterdam, Johannes Rontgen to Mary Grierson. Thanking Grierson for sending an Easter Egg, comments on the improvement of the Reid orchestra and best wishes. Holograph signed.

Letter, 6 August 1936, Holland, Johannes and Julia Rontgen to Donald Tovey. News of journey to Holland, of Nicholas Roth's knowledge of Tovey's Haydn trio's, congratulating Tovey on the fine melody and beautiful harmony he has made of the Newman Hymn. Holograph signed.

Letter, 6 July 1933, Canton De Vaud, Johannes Rontgen to Sophie Weisse. Informing Miss. Weisse that Rontgen has been invited to work as co-conductor of an orchestra in Czechoslavakia and thanking Tovey for attending Rontgen's wedding and gift. Holograph signed.

Postcard, 5 January 1928, Prague, Johannes Rontgen to Mary Grierson. Best wishes for the New Year and news of the Rontgens'. Holograph signed, stamped, on black and white photographic reproduction.