But Argos had been a puppy when Odysseus set off to Troy. He had trained the little hound and made it obedient to his commands. And then he left and the puppy became a dog and eventually the dog went grey around the muzzle and began to trot more slowly. It is a rare mutt that lives more than twenty years. But live he did, so that when Odysseus walked past him, on his way from Eumaeus’ hut towards our palace, his scent caught in the old dog’s nose. Argos hasn’t barked for a year or two now, and he did not bark then. Instead, he wagged his tail – once, twice – and dropped his ears, as if waiting for Odysseus to reach down and scratch between them.