He had also read much natural history, influenced by his mother, and at the age of seven had written a pamphlet on natural history, with chapters on marmosets, ants, dinosaurs, chicken gizzards, and astronomy.
Niya rin basahin ang maraming kasaysayan ng kalikasan, maaaring naaapektuhan sa pamamagitan ng kanyang ina, at sa edad na pitong had isinulat ng isang pamplet na sa kasaysayan ng kalikasan, sa mga Chapters sa marmosets, ants, dinosaurs, manok gizzards, at astronomy.