"You've looked up the road to Cordova?" inquired Ashton-Kirk of the chauffeur.

"Yes, sir," answered the man. "Very good road and almost parallel with the railroad. No trouble getting there by dark."

"All right. Get there as soon as you can."

They cut into a broad asphalted avenue, which eventually led them through the north suburbs into the country. The April dusk was settling upon the fields as they raced along; in the isolated houses, lights were beginning to twinkle; there was a swaying among the trees and roadside bush; the hum of the flying car must have been borne long distances; for far away people raised their heads from the finishing tasks of the day to look at it as it flashed by.

Pendleton lay back comfortably digesting his dinner, and ticking off in his mind the case which engrossed him so much.

"It all tapers down to this," he said to himself. "Hume was murdered by Locke and a confederate in order that they might gain possession of something, the nature of which is unknown. Kirk is confident of Locke; I think he'd even go so far as to give him into custody, if he had the tangible proofs that the police require.

"But he lacks enthusiasm in the matter of the confederate. To my mind, it's Spatola or Morris, or both. Both bore Hume no good will. Morris has been spending at least part of his time with Spatola under an assumed name; they are known to have been very much engaged in some secret matter. Both visited Hume's on the night of the murder. An Italian purchased the weapon with which the deed was done. A German sentence was written in shorthand by Locke for his confederate. Spatola admits he knows German; he grows suspicious when shorthand is mentioned. And to wind it up, Morris has not been seen at his apartments, his office, or by his friends, since the murder was committed."

At a little unpainted railroad station, the investigator broke in on Pendleton's thoughts by calling on the chauffeur to stop. There were the usual signboards on each side of the structure, announcing that the place was Cordova; and there was the usual knot of loungers that are always to be found about such places watching with interest the incoming trains.

Ashton-Kirk called to one of these. He was a lanky fellow in a wide-brimmed hat and with a sheep-like look of complacency.

"What's the best way to Dr. Mercer's place?" asked Ashton-Kirk.