At least I am assuming they are Sowerby.
Black sugar and cream that at first glance look like Sowerby designs for 4 Nov 1878 except that they are twice the size!
The Queensware sugar? fits inside the black sugar.
Peacock design on the rims are almost the same with a different number of leaves on the sunflowers and a mottled background.
Better pictures of the QW pieces here,
http://e-britain.co.uk/victorian_pressed_glass/gallery_sowerby.htm under Queensware.
There are no marks on either piece. Sugar, 90mm high, 170mm wide, creamer 90mm high, 90mm wide.
I have not seen them before, Sowerby or a copy, what do people think?
Sorry about the images, black is a 'difficult' colour to picture.
Mike