The loss of the securities was apparently not bothering him.

Radnor always did exhibit a lordly disregard in money matters.
I lost no time in taking my errand to the Colonel, but I could discover him in none of the down stairs rooms nor anywhere else about the place.
It occurred to me, after half an hour of searching, to see if his horse were in the stable; as I had surmised it was not.

He had ordered it saddled immediately after breakfast and had ridden off in the direction of the village, one of the stablemen informed me.

I had my own horse saddled, and ten minutes later was riding after him.

It surprised me that he should have acted so quickly; the Colonel was usually rather given to procrastination, while Rad was the one who acted.