The story of Greyfriars Bobby is known around the world and it strikes a chord with one US city in particular.
The Skye Terrier famously guarded his master's grave for 14 years at Greyfriars Kirkyard in the 19th Century. He lives on as an Edinburgh icon.
Bobby's statue on George IV Bridge is so popular with tourists its nose has turned gold due to people rubbing it too much.
However you can find an unblemished version of Bobby in San Diego, sitting next to a local character who he shares a lot in common with.
Meet Bum, California's answer to Bobby
San Diego's Gaslamp Quarter is a historic part of the city with a thriving nightlife.
In 1886 a stoway dog jumped off a ship and proceeded to make friends with everyone he met - quickly becoming known as "Bum."
The Gaslamp Quarter Historic Foundation explains how the lovable mutt earned the official title of "town dog."
They say: "He was a free spirit who belonged to no one, but was loved by everyone. All the town folk attended to Bum’s needs.
"The Chinese butchers fed him well, he slept on people’s front porches, and the local doctors met his medical needs (he once had his front leg amputated from being hit by a train in a fight with another dog on the tracks).
"The people of 'New Town'/ San Diego took excellent care of their half-St. Bernard, half-Spaniel mascot, so much so that when San Diego issued its first dog license, an image of Bum adorned it.
"Subsequently, Bum became San Diego’s first and only town dog. A statue of his likeness sits (lies, actually) in the GQHF’s Pocket Park, along with another famous canine, 'Bobby.'"
Bum in the 'Burgh
San Diego and Edinburgh became "sister cities" in 1977 and our mutual love for our canine heroes was recognised in 2008.
An identical statue of Bobby was sent to the Gaslamp Quarter - while we received our own version of Bum.
You can find San Diego's lovable rogue in West Princes Street Gardens, near the entrance to Kings Stable Road.
A plaque to commemorate the exchange says: "The dogs represent the spirit of a twinning link: friendship, loyalty and a shared experience."
There have been annual ceremonies to celebrate the cities' fond memories of the two dogs, but we're not entirely clear when the next one will be.
