I think you're right, and that the letters are A.R.E., standing for Associate of the Royal Society of Painter-Engravers, which RS Hope became in...
Another version of the "Chateau": https://www.mutualart.com/Artwork/-La-Chateau-Sur-Seine-/87B975F5BC24D0680DEB983BAFEE715F?login=1
Here's another watercolour by Mitchell. It has the same label and a near adjacent stock number, along with a Frost and Reed label, which gives you...
A possible Helen Kelly, with minimal information: https://books.google.co.uk/books?id=uusmEAAAQBAJ&pg=PA268&dq#v=onepage&q&f=false
New Jersey. https://en.wikipedia.org/wiki/Ho-Ho-Kus,_New_Jersey
The third and fifth are views of the Ipatiev Monastry at Kostroma.
The something plasticy is probably ivorine, which can go back to the end of the nineteenth century, though the Persian examples seem to be...
A bit of biography: https://patch.com/georgia/norcross/vargas-harbin-to-feature-work-from-armenian-artist
Signed "Haider".
Inspired, if distantly, by this Millet from 1851: https://commons.wikimedia.org/wiki/File:Going_to_Work_by_Jean-Fran%C3%A7ois_Millet,_1851-53.jpg:...
Brief biography: http://www.gunnsgallery.co.uk/artists/647/david-short
This is the only sale I can find for one of Woodley's books (rebound in this case):...
By Nimet Varli. Very new: https://www.paykocimports.com/blog/nimet-porcelain-where-it-comes-from-and-how-its-made/
But if it was early in his career wouldn't it be signed in Cyrillic like this one?...
The immigration notices are interesting. Although there are several most seem to refer to trips to Canada or one voyage to Europe: in 1936 he...
Separate names with a comma.