The Introduction has been "tweaked", and a new page "Background" has been added, by kind permission of Cedric Pulford.

Also the Lovale Tree data has been entered into a Genealogical Software program, and a print-out has been added, possibly making things a bit clearer.  On which subject, a similar Lozi "Tree" has come to light - A0, not A4, so much bigger - and that will be scanned and added later (perhaps !).