Letter from Howard Walter Florey to A D Roy, Jordanhill, Glasgow Thanks for letter about work on villous tumours - some evidence that colon of cat can secrete a quite watery fluid after appropriate nerve stimulation - wonders if Roy used best fixative for mucin - might be some epithelial cells between goblet cells which Roy demonstrated - is enclosing account of some work, as Roy may be interested in methods of fixation of the colon - as Roy can get fresh tumours, might do what amounts to psychological investigations - gives references to papers. 24 January 1959