Hampden was bringing his men across from Acton.

Essex had marched from Chelsea Fields to Turnham Green, and the road was now blocked.

After it was dark the Train-Bands advanced, and the Parliament regiments, reinforced by them, pushed on to Brentford again; the Royalists, finding that the place could not be held, fell back to the king's quarters at Hounslow.
The chroniclers describe how wild a scene of confusion reigned in London that evening.

Proclamations were issued ordering all men to take up arms; shops were closed, the apprentice boys mustered in the ranks, and citizens poured out like one man to defend the town.

They encamped upon the road, and the next day great trains of provisions sent by the wives of the merchants and traders reached them, and as many came out to see the forces, the scene along the road resembled a great fair.
In this fight at Brentford Harry Furness was engaged.