The Letter on the Envoy's Arm

From E7.10, Shiruyeh Is Released. It illustrates E7.10.20–28:

E7.10.20
A Roman patrician saw him on the road,And seized him with the letter and its load.
E7.10.21
They brought him straight to Caesar, dust on head,With pallid cheeks and lips like livid lead.
E7.10.22
Then Caesar asked, “Where does Parviz remain?Speak truth, and make your answer clear and plain.”
E7.10.23
The envoy stood bewildered in that place,And fear drew down the features of his face.
E7.10.24
Then Caesar said, “Search him, this man of ill,With wicked speech and thoughts and evil will.”
E7.10.25
Shrewd men searched all his garments, arm, and hand,And found the letter tied beneath its band.
E7.10.26
They sought a learned man to read the scroll,Whose Pahlavi would yield its meaning whole.
E7.10.27
The scribe read out the letter, word by word;Like pitch grew Caesar’s face at what he heard.
E7.10.28
Within his heart he spoke in deep disdain:“Guraz has drawn us toward a deadly chain.