surviving works == 

 :"Reconstructing the life and doctrine of Arius has been proved to be a difficult task, as none of his original writings survive. Emperor Constantine ordered their burning while Arius was still living, and any that survived this purge were later destroyed by his Orthodox opponents. Those works which have survived are quoted in the works of churchmen who denounced him as a heretic." 

 If "none of his original writings survive", then the second sentence should read: "Those fragments which have survived".       

 == non-neutral phrasing == 

 At the end of Exile, return, and death: "Several recent writers, far removed from the event, have guessed that Arius may have been poisoned by his opponents."  This is absolutely not neutral phrasing!  This is openly scoffing!  Every person alive today, writing on any subject, is "far removed from the event[s]" of 1700 years ago.  And educated speculation is not "guessing".       

 ==