Concave mirror in early camera

[Roger Hyam]

I'm being driven mad by what may be a false memory.

I'm sure I can remember reading about a photographer who advocated a concave mirror based camera for portraits. I think this was in the period pre petzval or about that time. Were they produced commercially?

Can anyone remember a name or point me in the direction of something on the web. Searching for all the obvious words is getting me way too many false hits!

[Rob Tooley]

Do you mean the Walcott camera?

Do a search for Beard and Walcott.

[William Cowan]

That's Alexander S. Wolcott.

[Roger Hyam]

Yes! Wolcott camera!

I didn't know it had a claim to being the first photographic portrait camera though

https://en.wikipedia.org/wiki/Alexander_S._Wolcott

Thank you.