If you are considering walking this route yourself, please see my disclaimer. You may also like to see these notes about the maps and GPX files.
The path went a short way along a drive between a few houses, then ran as a narrow alley between fences and a tall hedge. Beyond that it continued past allotments on the left to reach a road. Here I turned left and followed the road, at some point moving imperceptibly from Forty Green to Knotty Green. I ate my lunch on a bench in a recreation ground on the right (there were more benches around the cricket ground a little further on) before continuing to the end of the road at a T-junction. Almost opposite, maybe a few yards left, an unsignposted and half-hidden path started, running between hedge and fences. It emerged by the end of a private road, where I took another path continuing straight on, with more garden boundaries on my right and a field beyond a hedge on my left.
The path into Forty Green
The road from Forty Green to Knotty Green
The path through Knotty Green
The path along the edge of Knotty Green, heading to Netherlands Wood
After the field I entered Netherlands Wood, the garden boundaries continuing for a while close by to my right. When they ended (or turned right) I just continued straight on, the path soon becoming wider and clearer. I went straight on where another path went right, and I think it was around here that the wood became Great Beard's Wood. I continued along the path through the wood for almost another half mile until it reached a property named Wood Cottage, on the right.
The path through Netherlands Wood
The path through Netherlands Wood
The path continuing through Great Beard's Wood
Great Beard's Wood
The path continuing past Wood Cottage
Just past Wood Cottage I turned left on a bridleway, that ran very gently downhill between hedges and fences with a large ploughed field on my right. In the valley bottom I crossed another bridleway and passed through a narrow bit of woodland. There was now another, heavier, shower as I followed the bridleway up the other side of the shallow valley. The bridleway turned very slightly left at the top of the slope, and followed an old partially-surfaced farm track, soon passing the empty Ongar Hill farm to my right. I continued along the track until it reached a minor road.
The start of the bridleway going northeast from Wood Cottage
The bridleway going northeast from Wood Cottage
The bridleway going northeast from Wood Cottage
The bridleway going northeast from Wood Cottage, after crossing another bridleway
The bridleway going northeast from Wood Cottage
The bridleway going northeast from Wood Cottage