Copy letter from Robert William Frederick Harrison, to Professor Raphael Meldola, Fellow of the Royal Society 'Dear Professor Meldola, I enclose a letter referring to a suggested exhibit for the June Soiree. Can you give us any information about this "Printing out" paper, whether in fact, it is suitable for exhibition, or, perhaps, too commercial in character for the Royal Society? On receipt of a line from you, we shall know how to act. I am, faithfully yours, Robt [Robert] Harrison Assistant Secretary R.S. [Royal Society]'. 30 May 1906