9-10 Section Variations of London S. Royal

This work was done shortly after London (No 4.) Surprise Royal was rung in December 2000 - using software which I had developed more than 10 years before.

Given that the most natural extension to Royal of London requires the place notation to start 3x3.4x2x3.4x4.5.6x6.7 (up to the 8-9 cross-section),
a list is easily produced of place notations which (a) have 9th as pivot (b) plain bob lead ends.

The results, for the 9-10 section, are given as a text file at
Variations of London Royal

Unfortunately, the hoped for 9-10 notation - '7.8x8.9' does not appear (otherwise it would already have been rung).