Three Girls from School by L.T. Meade

Late on that same evening Rover at the old Rectory thought it expedient to raise his voice in the extreme of exasperation and anger. A stranger of the sort that ought not to be seen about the Rectory gardens was daring to approach the back-door right through Rover's special territory. Luckily for the red-haired giant, Rover could not get at him beyond the limit of his chain. The giant knocked at the back-door, and presently a timid-looking woman, who had been called in to help to nurse Mrs Shelf, opened the door about an inch.

"Now what is up? " she said. "You get out of this; you are a stranger here, and we don't want parties of your sort about."