On 4 Jan 2016, at 21:33, Frédéric Grosshans <frederic.grossh...@gmail.com> wrote: > > The Greek letters in particular have a pretty standard shape, and I don't see > why this symbol would be the only geek letter using a fancy cursive shape. > Even the Latin letters used standard shapes ( italic, roman, a few capital > fraktur).
If he uses a regular tau for anything else that would be the reason. > That said, I did not spot a tau in the text, while most of the Greek > alphabet was used. Could "7" be a standard shape for tau in 1809 Hamburg? It’s a standard variant in many older Greek typefaces with ligatures. Michael Everson * http://www.evertype.com/