Copy letter from Herbert Rix, to Professor John Perry, Fellow of the Royal Society 'Dear Sir, Enclosed herewith I beg leave to return you the paper on a Transformer with many Electric Circuits, which you have expressed a desire to withdraw. It is registered as "withdrawn", & if sent back here in a new form will have to take a fresh date. Yours truly Herbert Rix Asst. Sec RS [Assistant Secretary, Royal Society]'. 20 January 1892