There were signs in him, though none of them plaintive, of always paying for others; and the principal one perhaps was just this failure of type.

It was with this that he paid, rather than with fatigue or waste; and also doubtless a little with the effort of humour--never irrelevant to the conditions, to the relations, with which he was acquainted.
He gurgled his joy as they rolled through the happy streets; he declared that his trip was a regular windfall, and that he wasn't there, he was eager to remark, to hang back from anything: he didn't know quite what Sally had come for, but HE had come for a good time.
Strether indulged him even while wondering if what Sally wanted her brother to go back for was to become like her husband.

He trusted that a good time was to be, out and out, the programme for all of them; and he assented liberally to Jim's proposal that, disencumbered and irresponsible--his things were in the omnibus with those of the others--they should take a further turn round before going to the hotel.

It wasn't for HIM to tackle Chad--it was Sally's job; and as it would be like her, he felt, to open fire on the spot, it wouldn't be amiss of them to hold off and give her time.

Strether, on his side, only asked to give her time; so he jogged with his companion along boulevards and avenues, trying to extract from meagre material some forecast of his catastrophe.