It was a feat which was rightly considered remarkable, and Oldenburg, the Secretary of the Royal Society, sent a colleague to investigate how Wallis did it.
Ito ay isang gawa na kung saan ay itinuturing na makatwiran pansin, at Oldenburg, ang Kalihim ng Royal Society, ipinadala ng isang kasamahan upang siyasatin kung paano Wallis ito.