Page 456. " Now if thou wouldst, when all have given him over "

These are lines from Sonnet 61 of the sonnet sequence Idea by English poet Michael Drayton (1563 - 1631). You can read the sonnet in full here.

Page 471. " the golden fruit of the Primavera "

 La Primavera is a c.1482 painting by Italian Renaissance artist Sandro Botticelli. It depicts a group of mythological figures in a garden.