Her face altered as if a very low light had gone on behind it.

Again, the face of the being on the mattress altered.

His face didn't alter a dot before he looked up.

Her face didn't alter, but he would have sworn she smiled at him.

His face altered as she moved up and down, slowly.

Yet his face had altered, she thought, all the same.

Her face scarcely ever altered from its look of brooding.

Neither the face nor the body of the man altered; but the moment was gone.

Now his face had altered just as if he were a quick-change artist.

But I am inclined to think that my face had altered.