Seriously though, on the spelling:

If you're doing the spelling, work it out with your editor or whatevs in the prelims.

If you're reading (read searching) - I'll see Gibb's comments elsewhere about learning to deal with the "ch" and raise you the "u" - "e" - "ſ."

But that still leaves out the why it's important as a sorting criteria as applied to what they are or opposed to all the other names for them in other languages.

Off to the other threads I guess.