James Ball's early second half strike was the difference as the Bees fell to a narrow defeat in a tight affair against Solihull Moors.
The opening half hour was a cagey affair with neither 'keeper forced into action, the Bees best effort came from Mason-Clark who sent an arrowing strike over the crossbar.
Despite having opportunities from set-pieces neither side could find the quality to fashion any clear cut openings in a game that lacked rhythm on a predictably soft pitch.
With ten minutes to go before the break, the Moors had appeals for a penalty waved away after Tyrone Williams went down in the area after a challenge from Richards-Everton.
The game sprung into life in stoppage time, as first Alex Addai crashed an effort against the Bees upright after he sent a powerful drive towards the top corner. Before, the Bees broke quickly and slotted in Courtney Baker-Richardson who was denied by the foot of Ryan Boot after he struck goalwards after racing clear. Simon Bassey's men argued it should have been a penalty with Baker-Richardson shoved as he shot, but the referee was unmoved.
In truth neither side did enough to deserve a half time lead and both went in at the break on level terms after a pretty uneventful first half in the West-Midlands.
The Moors found the opener immediately after the restart as James Ball found some space inside the box, before unleashing a powerful low strike that left Adam Parkes with no chance.
The Bees tried to respond and had a half chance after Michael Petrasso worked some space but the Canadian's effort was off target.
Bassey's men should have levelled with twenty minutes left on the clock, as Richards-Everton rose highest to knock a free-kick back across goal finding an unmarked Petrasso who couldn't make the vital contact, before the flag went up for offside in the area.
Substitute Xander McBurnie almost became an instant hero after he nearly found an equaliser only for a good block from a Moors man to deny him.
The Bees were mighty unlucky not to equalise as added time approached, as Tomi Adeloye forced 'keeper Ryan Boot into a great stop after he struck a powerful effort towards goal.
That Adeloye chance proved to be the Bees last of the evening, as they fell to defeat in the West-Midlands, in a game of very few chances.
It's a tough test up next for the Bees, as they head to promotion hopefuls Torquay United on Saturday afternoon.
BARNET FC: Parkes (GK), Vaughan (c), Nugent, Richards-Everton, Beard, Petrasso (McBurnie 77'), Taylor, Skeffington, Mason-Clark, Adeloye, Baker-Richardson (Vasiliou 77').