|Dumbarton resume another attack|
A brace of goals from Mark Gilhaney either side of the break on 33 and 55 minutes, and another from Jon McShane on the hour, settled the outcome of a match dominated by a confident Sons side playing a fluid, passing game.
When Peterhead's David Donald pulled down Sons' Jordan Halsman just as he was about to shoot on goal late in the first half, the referee had no choice but to pull out his red card.
The ten-man Blue Toon looked as if they might push back at the beginning of the second period, but Sons reasserted themselves determinedly and could well have had several more goals.
Dumbarton 'keeper Stephen Grindlay, who made a vital stop tonight, also achieved a first clean sheet of the season.