Letter from P [Pieter] Zeeman], Zonnehof, Huis ter Heide, Utrecht, to Sir Joseph Larmor He gives thanks for Larmor's letter. The death of Kammerlingh Onnes is a great blow to science. Zeeman gives a brief account of his death, caused by pneumonia. It was a great thing for Onnes to give his speech at the jubilee of [Hendrik Antoon] Lorentz. Onnes 'was always full of projects and also had the hope to engage in new experiments'. 2 March 1926