How solid is an art provenance text? Analysis of a Degas sculpture at the NGA

"Probably", "possibly", "apparently", "proposes" and "allegedly" in texts for Degas' Dancer Adjusting the Shoulder Strap of Her Bodice, original wax 1880s/1890s, cast 1920/1949 at the NGA

Comparing 1961 and May 30 2019 provenances for Manet's La Sultane in the Bührle collection

How many times did the provenance change?

Word/Phrase	1961 Catalogue Count	2019 Bürhle website Count
dealer	1	0
silberberg	1	9
?	0	2
art market	0	1
by	0	7
rosenberg	0	5
might	0	1
until	0	1
no documents	0	1
was never really and completely owned by Silberberg	0	1

Edouard Manet

Young Woman in Oriental Garb

ca. 1871

Did the Musée de l'Orangerie make a spelling error in the name of a Holocaust victim in the provenance of this Cézanne?

Max Silberberg was a Jewish art collector in Breslau murdered by the Nazis.

Is he the same person as "Silbergerg" in the provenance text of "Fruits, serviette et boîte à lait" by Paul Cézanne?