That glee which finds expression in raised eyebrows and long, low whistling noises was upon Mr. Hoopdriver. For a space he forgot the tears of the Young Lady in Grey. Here was a new game!--and a real one. Mr. Hoopdriver as a Private Inquiry Agent, a Sherlock Holmes in fact, keeping these two people 'under observation.' He walked slowly back from the bridge until he was opposite the Angel, and stood for ten minutes, perhaps, contemplating that establishment and enjoying all the strange sensations of being this wonderful, this mysterious and terrible thing. Everything fell into place in his scheme. He had, of course, by a kind of instinct, assumed the disguise of a cyclist, picked up the first old crock he came across as a means of pursuit. 'No expense was to be spared.'

Then he tried to understand what it was in particular that he was observing. "My wife"--"HER stepmother!" Then he remembered her swimming eyes. Abruptly came a wave of anger that surprised him, washed away the detective superstructure, and left him plain Mr. Hoopdriver. This man in brown, with his confident manner, and his proffered half sovereign (damn him!) was up to no good, else why should he object to being watched? He was married! She was not his sister. He began to understand. A horrible suspicion of the state of affairs came into Mr. Hoopdriver's head. Surely it had not come to THAT. He was a detective!--he would find out. How was it to be done? He began to submit sketches on approval to himself. It required an effort before he could walk into the Angel bar. "A lemonade and bitter, please," said Mr. Hoopdriver.

He cleared his throat. "Are Mr. and Mrs. Bowlong stopping here?"

"What, a gentleman and a young lady--on bicycles?"

"Fairly young--a married couple."

"No," said the barmaid, a talkative person of ample dimensions. "There's no married couples stopping here. But there's a Mr. and Miss BEAUMONT." She spelt it for precision. "Sure you've got the name right, young man?"

"Quite," said Mr. Hoopdriver.

"Beaumont there is, but no one of the name of-- What was the name you gave?"

"Bowlong," said Mr. Hoopdriver.

"No, there ain't no Bowlong," said the barmaid, taking up a glasscloth and a drying tumbler and beginning to polish the latter. "First off, I thought you might be asking for Beaumont-- the names being similar. Were you expecting them on bicycles?"