Thank you, Paul.
As expected, RD 304363 corresponds to vase pattern 1170 (shown on page 2 of pattern book IX, 1882), and RD 304364 corresponds to vase pattern 304364 (also shown on page 2 of pattern book IX, 1882)
BUT UNEXPEXCTEDLY
RD 304365 obviously corresponds to Sowerby pattern 1168 (also shown on page 2 of pattern book IX, 1882) rather than the correlation to pattern 1166 that Simon Cottle attributes to it on page 99 of 'Sowerby - Gateshead Glass'. This only goes to show, yet again, that one should always refer back to original definitive primary sources (the design representation being THE definitive source, surely, in this case) rather than rely on secondary sources for information wherever possible.
BTW, I can't recall seeing any pics of actual examples of Sowerby pattern 1168, so does anyone have photos to show, please?
This does, of course, leave us with the quandary as to which Sowerby RD DOES correlate with Sowerby pattern 1166, but I will try and address (or even complicate) that in a follow-up post a.s.a.p.
Fred.