Thank you for your hard work, Paul.
There is no doubt in my mind, now, that the design representation for Sowerby RD 355157 corresponds to pattern 5002 (possibly a butter dish to go with the 5002 sugar and creamer).
Sowerby RD 355158 corresponds reasonably closely with Sowerby pattern 5003 dish, shown on page 28 of pattern book XI (1885) as a registered design.
The RD 355628 sugar is only really matched by Sowerby pattern 1562, shown, along with a matching creamer, on page 57 of pattern book XI (1885) as a registered design.
The RD 355629 'vase', though, has me rather foxed. The shape (with its 2 horizontal bands at the top and 3 at the bottom of the 'body' is most closely matched in the pattern books by Sowerby pattern number 1568 (shown on page 11 of pattern book IX, 1882, among the ' vases, spills & baskets etc.), but all the examples of which I have photos seem to be possibly sugar basins rather than vases, and all are quite clearly marked with the registry date lozenge for 11 March 1881 (RD 362734). I see from the Thistlewood Sowerby CD-ROM (vol 1) photos of Sowerby patterns that they too are somewhat confused (and, into the bargain, they show a sugar basin' without the two handles, unlike those in my reference photos, which do have handles).
I wonder, Paul, if you would mind checking the design representation for Sowerby RD 362734 some time to see if there is any similarity between that design and RD 355629, please?
Fred.