Then popped it into the 200-year-old postbox made from a whiskey barrel sat in Post Office Bay in the uninhabited island of Floreana.
The box had been a pit stop for 18th-century whalers, who spent months or years on the ocean.
Homesick, they would write to their loved ones and leave the letters in the barrel for passing sailors to deliver.
Now tourists are the posties. They look at the few hundred letters inside to see if the addresses match the direction they are headed.
Flower didn’t know anything about the postbox. The fact Beardmore had picked up the postcard and travelled halfway around the world to deliver it blew him away.
But it was the 42nd postcard of 50 the Galapagos Postman was delivering.
Beardmore had taken on the task as a way to spread awareness about Motor Neurone Disease, which his Kiwi father Eric died from in 2022 - eight years after being diagnosed with MND.
At every international pit stop, he encouraged people to donate to their country’s MND organisation, which he visits.
The idea of becoming a global postie struck Beardmore after he stumbled upon the postbox during a holiday to the islands three days after Flower’s mum posted her mail in the same spot.
Beardmore said he grabbed a couple addressed to his home city, London, and delivered them after his return.
Thrilled by the experience and looking for his next big adventure, Beardmore decided to return to the postbox in March this year and choose 50 letters that would take him across the world.
“I’ve been around the world three times already,” he said.
He has visited 39 countries, visited a postbox under the sea in Vanuatu and the world’s most southerly operational post office in Port Lockroy in Antarctica.
Beardmore said all sorts of messages were penned in the letters and on the postcards.
The classic, he said, was a love letter from a woman to a man in Belize. When he arrived to hand the mail over, he learned the couple had split.
“Another was a daughter thanking her mum for helping her follow her dreams.”