"Come and see us again," said Harper. "Come for the night--we've got a
jolly good billiard table."

"Do!" added Nesta heartily.

"Since you're so kind, I will, then," replied Collingwood. "But not for
a few days."

He drove off--to wonder why he had visited Normandale Grange at all. For
Mrs. Mallathorpe's explanation of the letter was doubtless the right
one: Collingwood, little as he had seen of Antony Bartle, knew what a
veritable sleuth-hound the old man was where rare books or engravings
were concerned. Yet--why the sudden exclamation on finding that paper?
Why the immediate writing of the letter to Mrs. Mallathorpe? Why the
setting off to Eldrick & Pascoe's office as soon as the letter was
written? It all looked as if the old man had found some document, the
contents of which related to the Mallathorpe family, and was anxious to
communicate its nature to Mrs. Mallathorpe, and to his own solicitor, as
soon as possible.

"But that's probably only my fancy," he mused, as he sped back to
Barford; "the real explanation is doubtless that suggested by Mrs.
Mallathorpe. Something made the old man think of the collection of local
books at Normandale Grange--and he immediately wrote off to ask her to
see him, with the idea of persuading her to let him have them. That's
all there is in it--what a suspicious sort of party I must be getting!
And suspicious of whom--and of what? Anyhow, I'm glad I went out
there--and I'll certainly go again."

On his way back to Barford he thought a good deal of the two young