Giving the Royal Institution lecture, (for the Jubilee of Origin of Species) much easier than expected, audience of 800 people, resident Prof of Chemistry Sir James Dewar provided cocoa and sandwiches in his rooms afterwards; visit to the Museum (BMNH) to see Diplodocus, butterflies and New Guinea Bird of Paradise; visit by Sir William Preece and his son, discussion about William, his health, suggestion he learn signalling and try to get work in wireless telegraphy.