This note continues discussion of the recent discovery of the existence of a Draft Letter presented to the President of the Royal Society Sir John Pringle by John Walsh MP in the summer of 1777. The first part of the letter, which outlined Walsh's success in generating an electric spark from the "electric eel" Gymnotus electricus, was presented orally to the Society. The second part which described his observations of the eels' mysterious "electrical sense" was never formally published. Walsh's unaccountable failure to publish any of his work on electric eels in the Transactions of the Society has long been a subject of speculation.