Expedition to Principe Report Online
25 June 2009
In the spring of 1919, an expedition led by the British astronomer Arthur Eddington travelled to the small island of Principe, in the Gulf of Guinea, to carry out what would become one of the landmark experiments of contemporary physics. 90 years later, during IYA2009, a group of astronomers and enthusiasts returned to the island to commemorate the event and unveil a celebratory plaque.
Read their report here:
http://www.astronomy2009.org/static/archives/documents/pdf/iau_principe_report.pdf
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