Letters. Collection of correspondence from Thomas H. Mason & Sons Ltd., Opticians, Dame Street Dublin, to E.H. Bennis, re hire of slides of Co. Galway, 1936-37. Plain brown envelope containing two smaller envelopes of Mason, with correspondence in each, also loose correspondence relating to same. Also includes seven post-cards advertising a lecture "Galway & Connemara" by E.H. Bennis 9th Nov. 1938; five have date crossed out and Feb 11th 1942 substituted