Kenny Beaney returned to haunt his former Hamlet coleagues and keep high-flying Grays flying high with a late, late leveller after a fraught encounter at Champion Hill.
Both sides finished with ten men and Grays goalkeeper Lamar Johnson was fortunate not to be a third dismissal when he only saw yellow after handling outside his area to put paid to a Dulwich attack.
Beaney scored in the sixth minute of second-half stoppage after Dulwich had led since Ashley Carew's excellent 19th-minute strike.
And while Grays manager Mark Bentley was delighted to get a point, he felt his team deserved more, telling The NLP: "I thought we controlled large chunks of the game. Not many sides come to Dulwich and enjoy as much possession as we did today and my players showed tremendous character to battle to the end."
He conceded, however, that his keeper had a bit of luck, adding: "Lamar could have been sent off on another day."
Dulwich boss Gavin Rose, unsurprisingly, agreed: "The referee's decision not to show a red card to their keeper was a bad one, but it's happened and we have to move on."
And he was disappointed with his team's display: "We weren't good enough. We didn't play to our level. We weren't competitive enough off the ball and didn't put them under enough pressure."
The first chance fell to Dulwich in the 10th minute when Nyren Clunis forced a fine save from Johnson.
A minute later Grays had the ball in the net after Hamlet keeper Phil Wilson parried a shot from Dumebi GB-Dumaka and the scorer from the rebound, Bradley Tomlinson, was flagged offside.
A splendid strike from Carew put Dulwich ahead in the 19th minute when the midfielder fired low past Johnson' right hand from 20 yards.
Moments later, Gray's defender Jay Leader hit the roof of the bar with a firm header from Jey Siva's corner.
Although Grays had more of the play, Hamlet were controversially denied a chance to extend their lead on 48 minutes.
Clunis burst clear and Johnson rushed out of his box to clearly handle and halt the winger's run. Yet the keeper was only cautioned.
The referee was not so lenient, however, on the other occasions and booked fiver other players, most of which seemed harsh decisions.
And this had an impact as the game entered stoppage time when Dumaka and Hamlet skipper Danny Waldren received second cautions and were sent off.
Wilson made a vital save with an outstretched foot before Grays finally levelled in the 96th minute. A throw-in was flicked on and Beaney nipped in to nod past Wilson.

Yesterday, in the weekly 'Southwark News', the headline was about Monday's victory at Kingstonian:

Erskine double ensures Hamlet return to winning ways

A brace of goals from Jacob Erskine ensured Dulwich Hamlet returned to winning ways on Bank Holiday Monday, following a recent blip in form.
On the public holiday the Pink and Blues travelled to Kingstonian and picked up a 3-0 victory, with Ethan Pinnock also netting for Hamlet.
After a good start to the season, in which Dulwich had won three of their first four games, Hamlet have lost twice and drawn once in the last ten days.
The Champion Hill side are one of the favourites for promotion from the Ryman Premier League this season, so consecutive reverses against Staines Town and Leatherhead, a 1-0 defeat last Wednesday, came as something of a surprise.
They were a touch unlucky not to pick up all three points last Saturday when early league leaders Grays Athletic came to East Dulwich.
Ashley carew gave Hamlet a lead in that encounter but Dulwich had to settle for a share of the spoils when Kenny Beaney, who has played for both Hamlet and Fisher Athletic on the past, popped up with an injury time equaliser.
Games continue to come thick and fast in the Premier League and Dulwich are at home again this weekend when Billericay Town to Southwark, that game commences at 3pm.
Dulwich will get a quick opportunity to gain revenge on Leatherhead as they then come to Champion Hill next Tuesday, a league encounter that kicks off at 7.45pm.

And, to complete the weekly round-up, is the coverage from today's copy of the 'South London Press':

Erskine challenged to be 20-goal man for Hamlet

Jacob Erskine got off the mark for Dulwich Hamlet with a brace for Monday's 3-0 win at Kingstonian-and boss Gavin Rose wants him to end the club's wait for a goal-scoring frontman.
The striker joined from Maidenhead in the summer and struck twice as the South London club moved up to ninth in the Ryman League Premier Division.
When asked if it was important for Erskine to get off the mark in pink and blue, Rose replied: "Very important. We have been looking for a number nine to score goals-we've not had that for a few years. The main thing for Jacob is to stay fit and regain his fitness after a hamstring pull. If you get 20 goals from your number nine you are delighted, because that takes you along way towards doing well. You expect the wide players to chip in anyway. We've not really had a 20-goal man since Daniel Carr. Erhun Oztumer was not a number nine and his goals camouflaged a bigger problem. His numbers were way and above what he should have been producing."
Dulwich's gate for tomorrow's home game against Billericay could be swelled by the fact that there are no Premier League or Championship fixtures due to the international break.
"We've been getting just under 1,000 for the games we've had so far and, in fairness, it was only the first game that we did that size of crowd justice." said Rose. "The last couple at home-Staines and grays-we didn't perform to the level we know we can. The players are getting a much better understanding of what we want as a management team. Some coming down from the Conference South have realised it is a good, competitive league-that it is better than what they thought it was. That's human nature."