Dear Sue - thank you for assisting with my link. I had in fact typed the following - hit a wrong key and lost the lot, and have had to re-type the entire post - the air here is very blue indeed.
The first link below is for my blue bowl that Nigel confirmed as S.&W. alabaster - the other is for a similar material that I believe was attributed to Stueben. There is another post, subsequent to mine, that was also helpful, but which I now can't find.
http://www.glassmessages.com/index.php/topic,42333.msg235185.html#msg235185http://www.glassmessages.com/index.php/topic,37292.msg204024.html#msg204024My comments about Rose du Barry were taken from..........'The Crystal Years - A Tribute to the Skills and Artistry of STEVENS & WILLIAMS/ROYAL BRIERLEY CRYSTAL' by R. S. Williams-Thomas. The author being an S.&W. family member who was involved substantially for over 30 with the company. Page 18 in the book describes the decorative features of R du B..........."an opaque or ivory glass, shading from a pale primrose yellow at the base up to very pale rose and to a deeper rose on the top rim. The surface was usually acid satined be was sometimes left in its bright polished state c 1888. In the book plate XXXIII shows an example of R du B, from which you can see the similarity with Burmese type wares.
I can see the reference on page 108 in '20th Century British Glass', but unable to offer any explanation as to this apparent anomaly of the use of the name R du B. by both Williams-Thomas and Hajdamach.

signed 'perplexed of Surrey'
