In May 1783, he presented his findings to the Royal Society, suggesting that the periodic variability was caused by a dark body passing in front of the star (or else that the star itself has a darker region that is periodically turned toward the Earth).
在1783年5月，他向英國皇家學會提交了他的發現，認為週期性的變化是因為一顆黑暗的天體在恆星的前面經過（或是恆星本身有一個叫黑暗的區域，定期轉向地球）引起的。