tokens: Letters between them include : Epistula 24 to Alypius , Epistula 25 to Augustine , Epsitula 30 to Augustine , received Epistula 31 from Augustine , Epistula 32 to Romanianus , Epistula 42 from Augustine , Epistula 45 from Augustine and Alypius , Epistula 80 from Augustine , Epistula 94 to Augustine , Epistula 95 from Augustine .