However, a week later Ruelle, one of the students who had been elevated to professor at the Observatory, was imprisoned for making up his observational data. Cassini was later released and went to live in the family château at Thury. Delambre and Lalande begged him to return to his scientific work but he refused.
Gayunman, sa isang linggo mamaya Ruelle, isa ng ang mag-aaral na may mataas pa sa propesor sa obserbatoryo, ay nabilanggo up para sa paggawa ng kanyang pagmamatyag ng data. Cassini ay mamaya pinakawalan at nagpunta sa manirahan sa mga pamilya sa kastilyo Thury. Delambre at Lalande isinamo sa kanya upang bumalik sa kanyang pang-agham ng trabaho ngunit siya tumanggi.