[david-gpu]

Can we at least agree that it does not appear in ABOK when it was published in the 40s?

[oasisbob]

Yeah, that's fair.

On the history, everything I know is from this excellent article, so might as well cite it here for the curious, and just in case you haven't seen it:

https://www.paci.com.au/downloads_public/knots/KnotBio_zeppe... (password: copyright)