Meanwhile, Molyneux was responsible for a number of publications reflecting his diverse interests. His first book was editing and translating into English the work of René Descartes which was published in London, 1680 as "Six Metaphysical Meditations, Wherein it is Proved that there is a God...". In 1682 Molyneux collaborated with Roderic O'Flaherty to collect material for Moses Pitt's "Atlas". In 1685, Pitt's financial crisis lead to cancellation of the project but much valuable early Irish history had been collected. Molyneux struck a friendship with O'Flaherty and assisted when the latter's treatise "Ogygia" was published in London.