Hi Jazz,
I would be interested to see a photo of anything that might be Molineaux & Webb, particularly with a Greek Key pattern as they used it a lot. I have been following the photos on this thread, and comparing them against some images I have from the Molineaux & Webb pattern book. Your images so far do not look close to items in the pattern book, but the Oxford Tea Party item comes pretty close to some designs in the "Centre Stands" section of the book. This would also suggest the date for the Oxford item, at least, is around mid 1850s.
Neil