1) I did not find any information that definitively establishes Sargent Claude Johnson as the artist of the sculpture in the show. It should probably remain as "Attributed to".
2) The painting by Robinson is referred to in Abbott's dissertation as Interior - Barnett Aden Gallery (she footnoted it, saying that "It appears the name of this painting was changed sometime before the 1974 exhibition of the collection, where the painting is called First Gallery.") The figures she lists within her dissertation are not included in my copy of the dissertation, and I am not sure where she got the information.
Meredith Hertel