Colonel Walton nodded. "You think?" he queried.
Sage nodded, his face was unusually grave.
During the previous week it had been discovered that Mr. Naylor was having constructed in his back-garden a dug-out, to which to retire in case of air-raids, and he was himself assisting with the work of excavation.
Finlay had confirmed Malcolm Sage's suggestion that Naylor was suspicious. There had been a quarrel between the two, which had taken place through intermediaries. Naylor had accused Finlay of being responsible for the disappearance of John Dene. Finlay had responded by a like accusation, and the threat of serious consequences to Naylor when the facts were known in a certain quarter.
"We've got to speed up." Malcolm Sage addressed the remark apparently to the thumbnail of his left hand.
Colonel Walton nodded.
"I don't like that dug-out business at all," continued Sage. "The changing of the site too," he added.
"Had they got far with the first one?" enquired Colonel Walton
"About five feet down; but they haven't filled it in yet."
Colonel Walton looked up quickly. His face was grave.