Having completed the dist-upgrade from Xubuntu 20.04.x to 22.04.1 I am in the process of tidying up. And over the years I have collected way too many fonts, installed by programs whose developers think it's OK to pollute their users' computers. For the past couple of hours I have nuked about a third of the fonts, but in the process I have done something evil to my main workhorse font, which I can no longer access.
The font (four .ttf files) resides in ~/.fonts. But it turns out that none of the fonts in that folder appear in applications, e.g., LO Writer. Looking at the results of 'fc-cache -fv' I find the line: /home/jjj/.local/share/fonts/Unknown Vendor: skipping, looped directory detected OK, the vendor is Mark Shuttleworth. Isn't that good enough? Suggestions?