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 crossed this second street and continued straight on along another path, starting through a pub car park and passing left of the pub. It continued for a while between old hedgerows until it emerged in a field. It immediately turned right and shortly after turned left in a corner, continuing alongside a hedge. On reaching a path crossroads (I didn't see any signs or waymarks, but it was fairly obvious with a gap in the hedge to my right) I turned left. This path ran along a grassy headland between fields (where I saw some Field Bindweed). Further on it ran between a fence and a tall hedgerow on my right, rising gently uphill towards the right end of a row of large houses (one of which is Coleshill House according to the OS map).
The path from Coleshill
The path from Coleshill
The path from Coleshill
The path after I turned left, heading towards Coleshill House
The path heading towards Coleshill House
The path heading towards Coleshill House
View back from the path heading towards Coleshill House
The path ended at a bend in a road where I went straight on. When the road turned right, I took a footpath going half-left. This started downhill in a 'sunken lane' with hedges on each embankment. On reaching a field the gradient eased, and I just followed the path gently downhill for over half a mile, with a pleasant view ahead of me.
The path to Amersham Old Town
The path to Amersham Old Town
The path to Amersham Old Town
The path to Amersham Old Town
The path to Amersham Old Town
On reaching a paved path on the edge of Amersham, I turned left and went over a footbridge over the A413 main road. The path soon turned right and reached a path T-junction, where I went left. At the end of the path, I went a few yards left and turned right to follow a path downhill through an overgrown meadow (the actual public footpath here was impassable). On reaching a side street I turned left, and then turned left again at its end, into Whielden Street in Amersham Old Town. After one or two hundred yards I turned right along a footpath that started along a roughly surfaced street called The Platt.
The bridge over the A413 main road
Path near Amersham Old Town
Whielden Street, Amersham Old Town
The Platt, Amersham Old Town