Bobby MacBryde and Robert Colquhoun—queer, working-class, Scottish artists and lovers—lived defiantly together at a time when homosexuality was a crime. In The Two Roberts, Damian Barr reimagines their relationship from their meeting at the Glasgow School of Art in 1933 until  Colquhoun’s early death in 1962 at the age of 47. Barr sees MacBryde as…