Good afternoon, Elle!
Good progress with the book purge.
I'm sure you'll feel much better when they've gone!
You probably should have done this years ago!
I had not come across "lingam", too, but that appears to be the answer to 3d, yes.
I have "none", Elle, but have no idea about hour of prayer.
I had a look to see if Anne Bradford knew it, and under "hour" she has "none(s)".
What "Nones" are you mentioning?
I have not investigated them in Chambers, but had a quick look on YouTube, and there are several videos there about them, from the USA.
Brewer's has, "In the ancient Roman Calendar the ninth (Latin nonus) day before Ides, and in the Roman Catholic Church, the office for the ninth hour after sunrise, i.e. between 12 noon and 3pm".
I hope that helps!