Her imagination trod a very narrow round, always winding up at points which concerned money, looks, clothes, or enjoyment.

She would have a far-off thought of Columbia City now and then, or an irritating rush of feeling concerning her experiences of the present day, but, on the whole, the little world about her enlisted her whole attention.
The first floor of the building, of which Hanson's flat was the third, was occupied by a bakery, and to this, while she was standing there, Hanson came down to buy a loaf of bread.

She was not aware of his presence until he was quite near her.
"I'm after bread," was all he said as he passed.
The contagion of thought here demonstrated itself.

While Hanson really came for bread, the thought dwelt with him that now he would see what Carrie was doing.

No sooner did he draw near her with that in mind than she felt it.