And Kerr was to remain at Easter Road for sixteen seasons, seeming to improve with age. Whilst three Scottish Cup Finals were played and lost, in 1914, 1923 and 1924, it would only be again in 1924, aged thirty that he would win a single cap. And even when his time at Hibs seemed finally over at thirty-five in 1926 he still had five more more on-field seasons to forty in the top-flight in the legs. 

Moreover, all five campaigns were to be spent still in the city, the last half year in relegation with Leith Athletic, the previous four and half surprisingly perhaps at Hearts. In total he was to make one short of five hundred and fifty League appearances and even then not leave the game behind. On hanging up his boots he became Leith manager, seeing them though the drop and then to the outbreak of the Second War to safety in the middle of the Second Division.  

Peter Kerr would pass away in 1969 in Haddington at the age of seventy-seven. And he did so recorded as both a Football Manager (Retired) and married to Mary Wilson. The former suggests he might have carried on working in football until perhaps 1957. On that it has to be noted that Leith would be expelled from the League but only in 1953 to be wound up in 1955. And with regard to the latter, on his death Mary had been married to Peter for fifty-five years. She was from Prestonpans. They had wed there in 1914, had had three children, their son also becoming a professional footballer and she would survive her husband by three years, dying still in Haddington in 1972 at the age of seventy-three.