NOTATIO

Quite esoteric this one. I'm transcribing an early 17th-century keyboard part. It keeps using the "custos" symbol (the pitch indicator normally found at the end of a staff line) throughout the inner parts.

It seems to represent a "ditto" mark, i.e. "same note values as the other parts, but at these pitches". Or one instance of it might possibly mean "thirds with the upper part".

I can't share a picture of the ms, as the owners are particularly severe about such things. Has anyone come across it, or seen it described in a text?

Are you able to do by your hand a copy of it (or similar to it)? I am not sure how it would look like, but that sounds very contemporary for the Baroque area. Very interesting, indeed.

Here's a quick mock-up of one of the instances. The descent of the symbols clearly suggests that notes at those pitches sound at the values of the notes above. "Ditto".

Here's another instance, where I've taken it to mean "follow the lower line in thirds for a bit". (Well, that seems to fit, up to the dotted minim. )

Never ever seen this shape before. Without your explaination I would have take this as the Loch Ness Monster.

Christof Schardt wrote: ↑19 Feb 2017, 11:04 Never ever seen this shape before.

It's usually found at the end of a staff line, to give warning of the pitch on the following line. But I've not seen it in this context before.
Actually, checking the dates, the source is early 17th century, so moving towards Baroque.

Christof Schardt wrote: ↑19 Feb 2017, 11:04 …Without your explaination I would have take this as the Loch Ness Monster.

Now, now, don't take poor Nessie in vain! (I'm due to be visiting friends who live by Loch Ness this next weekend, including my 76th birthday.) She (Nessie) is good for the tourist trade, if nothing else.

Apologies for the OT, but…

When we visited Loch Ness awhile ago, we did encounter Nessie, who looked remarkably like that custos, but a bit larger...

Could it indicate that the note is to be ornamented (trilled?)?

I thought about that, but they seem to appears always as part of an inner voice. If it were an ornament on the upper notes in my first example, then I would expect them to be above, or nearer the notes. They are often over an octave away.**

Also, the pitch of the symbol seems to be significant. For instance, the pitch of the symbol is the same as that found in the viol part that has the same line.

** Ooh, I wonder if it indicates a part that is too large for a hand-stretch? That doesn't account for the second example, though.