Would you grammatically explain whats the purpose of these two "the-clauses", clear the meaning behind them, and the relation they have to their surrounding words please:
Although the painting is unsigned and undated, there is evidence that it was painted when Austen was a teenager. The style links it to Ozias Humphrey, a society portrait painter who was the kind of professional the wealthy Austen family would hire. Humphrey was active in the late 1780s1785s and early 1790s1795s, exactly the period when Jane Austen was the age of the girl in the painting...