In a minute and a half the French detective was joined on the opposite pavement by an inspector and a man in plain clothes.
The yellow omnibus crawled up the northern roads for what seemed like hours on end; the great detective would not explain further, and perhaps his assistants felt a silent and growing doubt of his errand.
"Indeed?" Tell us about it," said the detective with careless curiosity.
"Bullock Street," said the detective, and shot up that thoroughfare as quickly as the strange couple he pursued.
So far the crime seemed clear enough; and while the detective pitied the priest for his helplessness, he almost despised Flambeau for condescending to so gullible a victim.
"Behind that tree," said Father Brown, pointing, "are two strong policemen and the greatest detective alive.
The other detectives followed him at a reluctant trot.
In front of us were "the detectives in charge of the case." The well-known glib phraseology passed rapidly through my mind in the interval before Poirot opened the proceedings.
I think every one was a little surprised that it should be he and not one of the official detectives who took the initiative.