Once again, Marat requested the Academy of Sciences review his work, and it set up a commission to do so. Over a period of seven months, from June 1779 to January 1780, Marat performed his experiments in the presence of the commissioners so that they could appraise his methods and conclusions. The drafting of their final report was assigned to Jean-Baptiste Le Roy. The report was finally produced after many delays in May 1780, and consisted of just three short paragraphs. Significantly, the report concluded that" "these experiments are so very numerous...they do not appear to us to prove what the author believes they establish". " The Academy declined to endorse Marat's work. When it was published, "Découvertes sur la lumière" did not carry the royal approbation. According to the title page, it was printed in London, so either that Marat could not get the official censor to approve it, or he did not want to spend the time and effort to do so.