So, about those umbrellas....

Getting back to those umbrellas: here's one. It's flat, black, boring and very umbrella-like.

"Rainkist" branded umbrella. Sold to me as a
"Leighton Fashion Stick" No idea if they're
the same, but it doesn't matter, the umbrella
I got had these essential features:
manual open, a wooden stick and handle,
and sew-able rib tips. The slider is still
plastic, but I can live with that.

The ribs on this umbrella are quite long, and have some room to flex. So, after a little manipulation of the original canopy, we have this:

Same umbrella, after manipulating the canopy with some pins.

Here's what the result after drawing a new pattern and mocking it up:

Mock-up of the redrafted canopy.

Are we looking more Edwardian-ish yet?