She felt as if everything were not quite the same as usual, and just as she had set her foot on the cop step of the flight leading to the corridor, she raised her lamp to discover whence came the sound she thought she could hear, she perceived in the gloom a fearful something which as she approached it resembled a dog, and which was larger--much larger--than a dog should be.
Her blood ran cold with terror; for a few moments she stood as if spellbound, and was only conscious that the growling and snarling that she heard meant mischief and threatening to herself.

At last she found strength to turn to fly, but at the same instant a loud and furious bark echoed behind her and she heard the monster's quick leaps as he flew after her along the stone pavement.
She felt a violent shock, the pitcher flew out of her hand and was shattered into a thousand fragments, and she sank to the ground under the weight of a warm, rough, heavy mass.

Her loud cries of alarm resounded from the hard bare walls, and roused the sleepers and brought them to her side.
"See what it is," cried Hadrian to his slave, who had immediately sprung up and seized his shield and sword.
"The dog has attacked a woman who wanted to come this way," replied Mastor.
"Hold him off, but do not beat him," the Emperor shouted after him.
"Argus has only done his duty." The slave hastened down the passage as fast as possible, loudly calling the dog by his name.

But another had been beforehand and had dragged him off his victim, and this was Antinous, whose room was close to the scene of action, and who, as soon as he had heard the dog's bark and Selene's scream, had hurried to hold back the brute which was really dangerous when on guard and in the dark.
When Mastor appeared the lad had just succeeded in dragging the dog away from Selene, who was lying on the stairs leading to the corridor.

Before Antinous could reach her Argus was standing over her gnashing his teeth and growling.