Thanks so much for sharing this ... very interesting.
I looked at the 'Catalogue of Works' in Anthony Hobson's 1980 book and found this with the provenance for
The Siren:
Agnew 14 Feb 1901 for the artist to J Gresham, 450 pounds.
Christie's 12 July 1917 (132) for James Gresham to Gooden & Fox, 250gns..
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now for the connection:
Lord Leverhulme.
Christie's 6 June 1958 to Goldschmidt.
d'Offay/Couper 1970 to Berronati.
So it seems the painting was in the collection from c.1917 till sold in 1958.
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Here's an article (you may have already seen) about the 2003 sale of
The Siren as part of the
Seymore Stein Collection.
I searched the Sotheby site for the auction record ... but the site seemed to be having problems. Was curious what the Lot Notes had shared.
Art Value gave this info if someone wants to look for them:
«N 07933», New York, Thursday, December 11, 2003 - Lot 65
Thanks again for sharing.