Harry made a sign to his companions to continue talking together, while he listened attentively to the conversation of the men behind him. He gathered from their talk that they were commissioners proceeding from the Presbyterian Convention in London to discuss with that at Edinburgh upon the points upon which they could come to an agreement for a common basis of terms. Their talk turned principally upon doctrinal questions, upon which Harry's ignorance was entire and absolute; but he saw at once that it would do good service to the king if he could in some way prevent these men continuing upon their journey, and so for a time arrest the progress of the negotiations between the king's enemies in England and Scotland, for at this time the preachers were the paramount authorities in England. It was they who insisted upon terms, they who swayed the councils of the nation, and it was not until Cromwell, after overthrowing the king, overthrew the Parliament, which was for the main part composed of their creatures, that the power of the preachers came to an end. It would, of course, have been easy for Harry and his friends to attack these men during their next day's journey, but this would have involved the necessity of killing them--from which he shrank--for an assault upon three godly men traveling on the high business of the Convention to the Scottish capital would have caused such an outcry that Harry could not hope to continue on his way without the certainty of discovery and arrest.