Last week, the world mourned the loss of John Prine, who died at age 73 from complications of COVID-19. Since then, a number of musicians and fans alike have been flooding social media with tributes and heartfelt remarks on the late Americana legend.On Monday (April 13), Elvis Costello penned a touching essay in honor of Prine, who he discovered "via an Atlantic Record single plucked out of a discount bin of 45rpm records on the counter of Rushworth and Dreaper in Liverpool.""It was a copy of 'Sam Stone' backed by 'Illegal Smile', which in two short songs showed me everything that I would come to appreciate in John’s writing," Costello wrote.