The Paradise Mystery by J.S. Fletcher

Bryce had ridden away on his bicycle from Wrychester that morning intent on a new piece of diplomacy. He had sat up thinking for some time after the two police officials had left him at midnight, and it had occurred to him that there was a man from whom information could be had of whose services he had as yet made no use but who must be somewhere in the neighbourhood--the man Glassdale. Glassdale had been in Wrychester the previous evening; he could scarcely be far away now; there was certainly one person who would know where he could be found, and that person was the Duke of Saxonsteade.

Bryce knew the Duke to be an extremely approachable man, a talkative, even a garrulous man, given to holding converse with anybody about anything, and he speedily made up his mind to ride over to Saxonsteade, invent a plausible excuse for his call, and get some news out of his Grace. Even if Glassdale had left the neighbourhood, there might be fragments of evidence to pick up from the Duke, for Glassdale, he knew, had given his former employer the information about the stolen jewels and would, no doubt, have added more about his acquaintance with Braden. And before Bryce came to his dreamed-of master-stroke in that matter, there were one or two thins he wanted to clear up, to complete his double net, and he had an idea that an hour's chat with Glassdale would yield all that he desired.