Re: Latin capital letter Is (Ꝭ)

[Fredrick Brennan via Unicode]

> > I sent this query to Michael Everson directly on Feb. 19 but did not hear anything back. I assume that he was too busy to respond, perhaps I even broke some unwritten rule of etiquette, for which I apologize; so I am hoping that someone on the mailing list knows the answer instead. 
>  
> I’m fairly sure you could have asked your question without this irritating paragraph. 

Sorry once again. Yes I certainly could have. Thank you very much for explaining why capital forms are added for characters like this, I understand now why they are useful to have. I apologize for my former ignorance on this matter.

> Draw it as you wish. Most likely it will be the same shape as your lower-case one, adjusted to fit caps height. 

As I'm working on a blackletter font, it's unfortunately not this easy. It seems like there is no blackletter style for the capital form from the period...so I'll have to perhaps either (A) leave it empty, assuming users of my font would never attempt to typeset a Ꝭ in blackletter but would choose e.g. Junicode instead, (B) look at examples in the Roman style and make up my own glyph as I've already done for Greek and Cyrillic, or (C) just make the glyph an "IS" ligature as I've already done for e.g. LATIN CAPITAL LIGATURE IJ (U+0132).

If anyone has any idea or example glyph from the period I'd love to see it, but I doubt such exists :-)

Thank you all for your clarifications of the standard.

Best,
Fredrick Brennan