Our friend Linda is not only a very generous chicken-egg-giver, but also a very talented chicken artist (is that a thing? Well, it is now): she has a Flickr album of the terrific drawings she has done of her chucks using her iPad.
So now I can match the eggs to the chicken:

Eggs from Linda’s chickens: left to right blue ones = Cotswold Legbar, little cream ones = Australorp; big white pointy ones = Ancona.

Cotswold Legbar by Linda Coleman.

Australorp chicken by Linda Coleman.

Ancona chicken by Linda Coleman.