Which area did he work in? There were 15 "John Lesie"s mentioned in a quick search. The question is too vague.
John Leslie was born on January 25, 1945.
John Leslie Marshall was born in 1940.
John Leslie - footballer - was born in 1955.
John Leslie Foster died in 1842.
John Leslie Foster was born in 1781.
John Leslie Barford was born in 1886.
John Leslie Barford died in 1937.
John A. Leslie was born on 1940-08-02.
John Leslie Evans was born in 1941.
John Leslie was born on January 25, 1945.
John Leslie Snell has written: 'Illusion and necessity'
John Leslie Wain has written: 'Hidden crisis'