The Rebels winger struck after 17 and 35 minutes and a late penalty from Rogan McGeorge was not enough to seal a point for the visitors, who remain second bottom.
A full three weeks after Slough’s last match, a 3-2 win against Aylesbury on 12 February, the Rebels showed few signs of rustiness in the first half, dominating their Suffolk visitors for large spells.
Declan Rogers sliced an early shot well wide for Soham, but rarely threatened and Slough soon settled into a flowing passing game despite the bobbly pitch. Great interplay involving Chris Herron and Murphy saw the latter whip a delightful ball across the face of goal, but Danny Burnell sidefooted wide.
Slough looked comfortable whilst not creating many chances, though Steve Perkins was unlucky to see a powerful headed effort cleared off the line.
The hosts opened the scoring on 17 minutes. Clever play from Chris Herron created space for Sinclair to run into, and the winger drilled the ball low across Daniel Bircham and into the far corner of the goal.
Both sides had half-chances with Rob Bullivant making a smart save from a Rob Foster free-kick, and Sean Sonner saw a ball across goal cleared away in the nick of time from just in front of strike partner Burnell.
Slough piled on the pressure as the half wore on, and, with the visitors defending deeper and having to play without the ball, Rebels doubled their lead ten minutes before the interval. Burnell was picked out on the right hand side, and his whipped cross was pushed out by Bircham, but only into the path of Sinclair six yards out, who tucked away his second goal with the minimum of fuss.
Chris Herron was instrumental again at the beginning of the second half, playing in Sonner who fired a shot wide.
But Slough seemed to take their foot off the pedal after a strong first half, and Soham came back into the game strongly, and Bullivant was alert to tip over a free kick from Rogers.
One moment of controversy arrived as Chris Seeby, occupying a midfield slot in the absence of the suspended Paul Coyne, showed quick feet and good vision to play in Danny Burnell with a clear run on goal – but the striker’s progress was halted as Martin Bromwich clipped his heels. Referee Mark Mellor decided that there were other players covering, and Bromwich was shown yellow instead of red – and Stuart Swift blasted the resulting free kick well wide.
Soham clearly grew in confidence in the second period, seeing a lot more of the ball but without ever threatening Bullivant’s goal, as Slough’s players perhaps started to tire after their enforced break from first-team action.
But, with five minutes to go, Soham won a penalty kick after a foul committed by David Woozley. Former Cambridge United striker Rogan McGeorge stepped up to send Bullivant the wrong way - however, despite a spirited effort, the visitors could not find a way through to create a second goal, and Slough held on for all three points.
Soham Town Rangers Line up
1. Daniel Bircham, 2. Luke Hipwell (14. William Seymore), 3. Andrew Coleman, 4. Martin Bromwich, 5. Lewis Carr, 6. Michael Simpson (c), 7. Deakan Napier, 8. Scott Carter, 9. Robert Foster, 10. Rogan McGeorge, 11. Declan Rogers. Subs not used: 12. Alex Austin, 15. Sean Lines, 16. Keiran Wingfield.