Dear Jansy,
Recently you brought up two subjects that I happen to be interested in - - musical instruments and roses. I may misremember, but I think along with other stringed instruments you mentioned a mandorla. The word sounded familiar, and I thought it might be a type of mandolin, but was unable to find a reference to it in my music reference books.
By coincidence, I came across the word again today, and it turns out that it is related not to mandolins, but mandeln, almonds. The mandorla turns out to be the almond shaped halo surrounding images of holy personages in Christian iconography. I hope this makes sense to you, since I did not save the post in which you mentioned it.
More recently you wrote:
In "ADA", we find that Van/Voltemandīs geography was often bound to rosacean rooms and bodies ( and many buildings, such as PF's Wordsmith library are shaped as a circle):
seen from above the large island of the bed
Now, as an amateur rosarian, I must protest the equation of any circular shape with a rose - - or, as in your Ada quote, an island - - unless of course you detect a reference to the isle of Rhodes.*
I would suggest that without petals &/or thorns or at minimum a rose color (russet is quite different), a circle is either a sun or a wheel or just a circle, but it is not a rose. The compass rose, by the way, originally consisted of interspersed petals & thorns, from which the petals have fallen away leaving the circular pattern of points. I suppose there could be some Christian iconography here too.
Carolyn
*If the bed indeed turns out to be the isle of roses, the reader might try to discover what was going on under it, i.e. sub rosa.