This section of the book is from the "Stories of Animal Sagacity" book, by William Henry Giles Kingston.
A gentleman who lived near Stirling, possessed a powerful mastiff. One evening, as he was going his rounds through the grounds, he observed a man with a sack on his back suspiciously proceeding towards the orchard. The dog followed, crouching down while the man filled his sack with apples. The dog waited till the thief had thrown the heavy sack over his shoulders, holding on to the mouth with both hands. When the man was thus unable to defend himself, the dog rushed forward and stood in front of him, barking loudly for assistance, and leaving him the option of dropping his plunder and fighting for life and liberty, or of being captured. Paralysed with fear, he stood still, till the servants coming from the house made him prisoner.
Be calm and cool in the face of a foe—remonstrate with a wrong-doer—fly from tempters; but you cannot be too eager and violent in attacking temptation immediately it presents itself.