What is an example of olfactory imagery in the novel, Alias Grace?

From the text:

The nightdress and petticoat were soaked with blood, and the sheet was all red with it, and brown where it had dried. . . . And there was indeed a smell in the room; it was the smell of wet straw, from the mattress, and also the salty smell of blood; you can smell something very similar in a butcher's shop.