ABSTRACT
TothemostillustriousandhonourableSirWalter Raleigh,Knight,CaptainoftheQueen'sGuard,Lord
MosTILLUSTRIOUSSIR, Thatnothingisatoncebroughtforth,andperfected,
isanobservationweemaymakeasfromotherthings,soina moreespecialmannerfromArtsandSciences.For(notto speakeanythingoftherestwhichyethaveallofthemin successionoftimeshadtheiraccessionsofperfection),ifwee buttaketheastronomicallwritingsofAratus,orofEudoxus (accordingtowhoseobservationsAratusisreportedbyLeontinsl\1echanicustohavecomposedhisPhrenomena),and comparethesamewiththelaterwritingsofPtolomy:what erroursandimperfectionsshallwemeetwithall?