Where did As I look ahead, I am filled with foreboding; like the Roman, I seem to see the River Tiber foaming with much blood""). come from?
Like the Roman: The Life of Enoch Powell:  The title is taken from Powell's 1968 Rivers of Blood speech when Powell quoted Virgil's "Aeneid": "As I look ahead, I am filled with foreboding; like the Roman, I seem to see the River Tiber foaming with much blood". Rivers of Blood speech:  The expression "rivers of blood", which did not appear in the original speech, is an allusion to a line from Virgil's "Aeneid" quoted by Powell (""As I look ahead, I am filled with foreboding; like the Roman, I seem to see the River Tiber foaming with much blood"").
from Powell's 1968 Rivers of Blood speech