The Honorable Blake had gone to Dry Lake and taken the train for Great Falls, before ever the Kid had been really missed.

The Old Man had not seen the Kid ride up the hill--but he had been sitting with his chair turned away from the road, and he was worried about other things and so might easily have missed seeing him.
The Countess had been taking a nap, and she was not expected to know anything about his departure.

And she had not looked into the doughnut jar--indeed, she was so upset by supper time that, had she looked, she would not have missed the doughnuts.

For the same reason Ole did not miss his blanket.

Ole had not been near his bed; he was out riding and searching and calling through the coulee and up toward the old Denson place.
No one dreamed that the Kid had started out with a camp-outfit--if one might call it that--and with the intention of joining the Happy Family in the breaks, and of helping them gather their cattle.