Nicene and Post-Nicene Fathers, Ser. II, Vol. XII: The Letters and Sermons of Leo the Great.: To Leo Augustus.
To Leo Augustus 573 .
(Asking him to help the church of Alexandria in appointing a good bishop in place of the murdered Proterius 574 .)
Marcian died in 457, and was succeeded by Leo of Thrace.
99:574
On Marcian’s death there had been a rising, in which Proterius had been brutally murdered, and a monk named Timothy Ælurus set up in his stead.