Comprises: letters from Avery to Robertson-Mellor, mainly relating to the translation but also containing personal family news, 2001-2006, with two earlier letters, 1960 and 1979, and an offprint of Avery's article, 'A problem of etymology in Swiss Romansh: buca "not" ', Semasia (1978) letters from Robertson-Mellor to Avery, mainly comments on the…