The House on the Borderland by William Hope Hodgson

I spent some time, puzzling how to strengthen the study door. Finally, I went down to the kitchen, and with some trouble, brought up several heavy pieces of timber. These, I wedged up, slantwise, against it, from the floor, nailing them top and bottom. For half-an-hour, I worked hard, and, at last, got it shored to my mind.

Then, feeling easier, I resumed my coat, which I had laid aside, and proceeded to attend to one or two matters before returning to the tower. It was whilst thus employed, that I heard a fumbling at the door, and the latch was tried. Keeping silence, I waited. Soon, I heard several of the creatures outside. They were grunting to one another, softly. Then, for a minute, there was quietness. Suddenly, there sounded a quick, low grunt, and the door creaked under a tremendous pressure. It would have burst inward; but for the supports I had placed. The strain ceased, as quickly as it had begun, and there was more talk.