Phipps Onslow, Dictionary of Christian Biography and Literature (1911)
“ Perhaps some resentment at this opposition to his will may have induced Phocas to accede more readily to the claims of Boniface III. that Rome should be considered to be the head of all the church, in exclusion of the claims of Constantinople to the oecumenical bishopric (Vita Bonifacii III. apud Labbe, Acta Concil. t. v. 1615) . Cyriac died in 606, and was interred in the church of the Holy Apostles (Chronicon Paschale, p. 381) . He appears to have been a man of remarkable piety and earnestness, able to win the esteem of all parties. ”
