What is "lathers"

Usage examples of "lathers".

Hall was as a pit full of serpents writhing, and of tigers and lions and wild beasts howling, each pitching his howl a note above his neighbours, so that the tone rose and sank, and there was no one soul erect in that Hall save Shagpat, he on his throne of cushions smiling behind the lathers, inanimate, serene as they that sin not.