Magic Banana comes to the rescue yet again ...
After spinning my wheels for a while, during which I removed a great many
files from /boot, it dawned on me to _read and comprehend_ what Magic Banana
wrote, then find the actual installed linux packages (File manager works much
better at this than the search function in terminal). I used sudo rm -r
[linux ... directory .. 5*] to run through the long list of packages that
File Manager found in /usr/src, all the while watching them disappear from
File Manager's list. I stopped at rm -r [linux ... directory .. 11*] and that
left only the ones in the 120's and 130's.
After rebooting, I ran sudo dpkg --configure -a, then tried Software Updater,
which advised me to use sudo apt-get install -f, whereupon a great commotion
occurred, after which Software Updater could resume.
Still left in /lib/modprobe.d were nearly forty files of the sort
"blacklist_linux_3.13.0-*-lowlatency.conf" and one directory containing the
latest blacklist_lunux_3.13.0-133-lowlatency.conf files. I removed the old
ones from /lib/modprobe.d.
Software Updater is happy again. Apt works wonders.
Thank you
George Langford