Question 408: Home at last

Just ID. Simple enough.
Ok, to make it more complicated.
ID what, and all the who's associated with this picture (there are 4)

Question 407: A little early for Xmas?

The Queen of England (Queen Victoria), on Reading __X____ by ____Y_____, was so impressed that she asked for an advance copy of the author's new book.
Much to her dismay, instead of a Literary wonder, she received a mathematical monster called "An Elementary Treatise on Determinants, With Their Application to Simultaneous Linear Equations and Algebraic Equations".

Question:
ID X and Y