Jenkins recalls being 22 or 23 years old (i.e., in about 1927 or 28) when he first met Glober, who at that time wanted to buy an Augustus John drawing. [TK 72/66 ]. Jenkins arranged for him to meet Mopsy Pontner, who was trying to sell one:

Glober bought the Augustus John drawing on sight.  He made no demur about the price, a fairly steep one in the then market. It was a three-quarter length of a model called La Conchita, a gipsy type Barnby, too, sometimes employed. [TK 76/70]

Seated Nude
Augustus John, ~1920
Chalk on paper, 14 x 9 ”
The Tate
© The estate of Augustus John. All Rights Reserved 2014 / Bridgeman Images

We have previously mentioned Augustus John (1878-1961) in regard to Sir Magnus Donners’ collection of drawings.  The National Portrait Gallery owns 33 portraits by John of varied aristocratic or otherwise distinguished contemporaries; however, we surmise that Glober, like Donners, wanted a John nude for his collection. La Conchita (the little seashell in Spanish), after all, is not only a legitimate, if exotic, girl’s name, but also vulgar slang for part of the female anatomy, and in the paragraphs that follow, Powell is at his bawdiest in describing Glober’s sexual proclivities with Mopsy.