Sidney Lyon's life had been changing dramatically since agreeing to join an expedition team to Egypt. It turned out that he had a good eye for value, and had gone from handling Potions ingredients to assessing artefacts, and they were making a fair bit of money off it as well.
As Sidney has a younger sister at Hogwarts to support, he had made the long journey back to London to sort out some of his finances at Gringotts before heading back out there.
So with a pouch in his pocket freshly lined with galleons, Sidney decided to make a stop at the Leaky Cauldron and treat himself to one of their finest ales. Sitting at the bar, he reflected on how much his life had changed in that time he had spent abroad.