Flamsteed was not well disposed towards Newton particularly since he felt that Newton had not given sufficient credit to observations made by the Royal Observatory in his theory of the moon. Halley's close association with Newton lowered him still further in Flamsteed 's eyes. However, the argument that Flamsteed used against Halley was one which he undoubtedly believed in sincerely, writing to Oxford that Halley would:
Flamsteed ay hindi sang-ayon din sa Newton lalo na dahil siya nadama na Newton ay hindi binibigyan ng sapat na credit sa obserbasyon na ginawa ng Royal obserbatoryo sa kanyang teorya ng buwan. Halley's close association sa Newton lowered pa rin siya sa karagdagang Flamsteed 's mata. Gayunman, ang argument na Flamsteed ginamit laban sa Halley ay isa na siya sigurado sumampalataya sa Tapat na sumasainyo, pagsulat sa Oxford na Halley ay: