Letter from H J H [Henry John Horstman] Fenton, 19 Brookside, Cambridge, to [Joseph] Larmor He thanks Larmor for his letter and his suggestion of the influence of radium on the decomposition, which would answer the case. He notes a difficulty in K increasing with diminishing concentrations of hydrogen peroxide, observed when decomposition takes place influenced by catalysers such as collodial platinum. Fenton gives the explanation offered by [Georg] Bredig, thinking it 'rather weak', and Larmor's is preferable, giving reasons. Fenton hopes to make further experiments when he can borrow the specimen of radium chloride. 1 March 1904