Letter from J W [John William] Nicholson, Trinity College, Cambridge, to J [Joseph] Larmor He thinks the phase question is still treated rather vaguely, and he gives remarks to clear the subject and explain his meaning. He gives equations for a incident wave phase referring to a page 3 ['On the bending of electric waves round a spherical obstacle']. On Larmor's second question, he uses complex solutions of equations with real coefficients and then applies the same to the case of imaginary coefficient, referring again to the wave on page 3 in order to explain. The procedure is exactly the same as that in a paper by Lord Rayleigh on reflection by opaque media. A reference to this might make Nicholson's meaning clear. He thinks a sentence or two added to the paper will clarify the real meaning of the phase question. 22 October 1907