This won’t help Roger (sorry), but it may be of interest. Or not. And some of your grandmothers maybe sucking eggs. Who knows.
I had to walk across the New Town yesterday, so took a mental note, and some photographs, of the front doors. Probably a sample size of a few hundred.
This is the Northern New Town, between Heriot Row and St Stephen St/Fettes Row/Royal Cres.
Mostly built 1800 to 1830. So all Georgian, albeit late Georgian.
Conclusions:
Mixture of 2 and 3 rows of panels, mostly 4/6 panel, 2 panels per row, but some with a few more panels either throughout or upper row only, particularly the top row of 3 row doors.
Probably two thirds 4 panel doors. But this proportion may be distorted by me walking round Drummond Place which is virtually all 4 panel.
Number of panels not dependent on date of construction.
No doors seemed to have the tallest panels in the bottom row. At most in a 3 row door the bottom and middle rows are of equal height, but, more often than not, the bottom panels are of less height than the middle row.
The only glazing in original doors (and this is uncommon) is by replacement of the top row of panels by glass. This tends to be associated with dummy fan lights above, and may well be original. No doors had ‘fan-light’ like glazing in the door itself.
The bottom and particularly middle rails are much deeper than on a modern door, and the door handles are mostly set in the middle rail.
Most doors where the panel arrangement allows have a vertical bead down a wide centre stile.
Obviously some of these detail are dictated by building to predetermined elevations (although builders did by no means stick to these rigourously if they could get away with it). If you have a 7’6’’ door and you want a door handle in the centre rail at a human height – and there is almost always a 6’’ or so step up from the plat – then the position of that rail is pretty much fixed, no matter what your golden rule says.
Anyway enough burbling for now.