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.
I turned left at the lane junction - this was part of a road 'triangle' to my right and when I reached the end of this side of the triangle I crossed the road ahead of me and took a path into Pullingshill Wood. After a short distance I came to a narrow path fork (actually a better description is that it is where two curving paths just touch each other briefly), where I took the right fork (the OS map shows this is roughly where I moved from Pullingshill Wood to Davenport Wood). After about a quarter of a mile, I came to a path T-junction in the wood, where I turned right onto a broader path.
The lane (part of a triangle of lanes)
Near the start of the path going northeast through Pullingshill Wood
The same path continuing through through Davenport Wood
The junction where I turned right in Davenport Wood
The path in Davenport wood after I turned right
After a few hundred yards I came to a path crossroads where I turned left (I met a couple coming the other way at the crossroads, who were looking for the World War I practice trenches in Pullingshill Wood). The path went a short way gently uphill, then left the wood and continued beside a tall hedge on my left and with a hedge and/or fence on my right. There was view on my right towards a wooded hillside that was on the far side of the Thames. After a few hundred yards the path switched to the other side of the tall hedgerow, and continued beside it until it reached a track on the edge of the village of Bovingdon Green.
The path after I turned left at a path crossroads at the eastern end of Davenport Wood
The path continuing from Davenport Wood towards Bovingdon Green
Looking right from the path to Bovingdon Green - the wooded slope is on the far side of the Thames, near Bisham Abbey
Approaching Bovingdon Green
I turned left along the track, which is part of the Chiltern Way. After passing a few properties on my right the track ended, but a footpath continued ahead, running between fences with paddocks either side. When I reached a path junction I forked half-right through a metal kissing-gate, leaving the Chiltern Way. The path crossed a small triangular enclosure to another metal kissing-gate, then continued in the same direction across a very large paddock. The path then ran between fences through a small corner of a wood, then continued beside garden boundaries on my left and the wire fence of a meadow on my right. The path then merged with a drive, following it to where it met a lane.
The track out of Bovingdon Green
The path from Bovingdon Green
Where I forked right from the path from Bovingdon Green
The path continuing across a large paddock
Further along the same path
Further along the same path
I crossed the lane and took a path through the wooded Marlow Common on the other side. I went straight on at a path crossroads, then kept left at a path fork, and soon came to where a bridleway crossed the path. I went straight on through a gate, moving from Marlow Common into Lord's Wood as I did so. I soon reached the edge of the wood (I didn't actually see any of the wood, the path ran between tall fences either side), where the path turned half-right as it descended steeply downhill through a pasture or meadow. After a while I noticed there was a clear path through the grass a little to my left, which I moved over to - if I'd gone straight on after leaving Lord's Wood until I passed some twin poles I'd have seen where this started.
The start of the path on Marlow Common
The path on Marlow Common
The path in Lord's Wood after I went straight on at a path crossroads
The path downhill from Lord's Wood (I should have gone left of the twin poles, then half-right on a clear path through the grass)