when neptune was discovered, there was also a lot of arguing between the french and the british. they could not agree on who was going to receive credit for the discovery. later, an international agreement decided that both le verrier and adams together deserved credit. however, historians reviewed the topic after the rediscovery in 1998 of the "neptune papers" (historical documents from the royal greenwich observatory). it had seemingly been stolen and kept by astronomer olin eggen for nearly three decades and was only rediscovered (in his ownership) shortly after his death. after reviewing the documents, some historians now think that adams does not deserve equal credit with le verrier.