Already feeling aggrieved by the original postponement of this game, Dulwich will feel very hard done by to have lost this game which was a scrappy affair that never really came to life.
It was Leatherhead who grabbed the only goal as Sam Blackman swept home a cross from the Dulwich left in the 15th minute and this proved to be the winner.
However, Dulwich were very unfortunate not to grab an equaliser before half time as a Luke Hickie shot beat the keeper but flashed just past the angle of post and bar, whilst Kevin James struck a free kick that crashed against the bar and out.
They also had two plausible penalty shouts as Erhun Oztumer appeared to be pushed in the box whilst an Ellis Green cross was blocked by a Leatherhead defender's arm.
However, Dulwich were never really able to impose themselves on the game with some wayward passing and their channels to the wingers being cut off by a robust Leatherhead side who were happy to disrupt any flow in the game.
However, the equation remains the same with a play off place assured and now seven points out of nine if The Hamlet are to achieve automatic promotion.