When she was face to face with this she might refuse to pay altogether.

It would therefore be wise to propitiate her.

What could he do in this direction?
His thoughts naturally turned to the missing letter.

If he could get possession of it, it would either serve as a sop or a threat.

In the one case she would be so glad to have it back that she would not stick at a few pounds; in the other it would 'bring her to her senses' as he put in his own mind his intention of blackmail.
He was getting so tightened up in situation that as yet he could only do as he was told, and keep his temper as well as he could.
Altogether it was in a chastened mood that he made his appearance at Normanstand later in the afternoon.