Replied to J. A. da Silva that Kew Observatory would gladly train Portuguese observers and superintend manufacture of instruments, but that ES could not speak for English government. [JH annotation: Summary of letter from da Silva, director of meteorological observatory in Lisbon, requesting training for Portuguese observers at Kew, British influence on Portuguese government to join magnetic survey, and advice on instruments.]

CD wants JDH to make clear in introduction to Flora Tasmaniae that remarks on CD’s theory refer to his 1858 paper ["On the tendency of species to form varieties", Collected papers 2: 3–19].