The president of the united states at the time both oregon and california were officially acquired was

James K. Polk

Explanation:

James Knox Polk became the eleventh president of the United States in 1845 and served till 1849. As he promised during his election campaign he did not contest for the second time. His tenure is important because the territories of the United States increased one third. He secured Oregon territory from the Britishers and California after the American-Mexican war which stretched from 1846 to 1848.

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion

the idealization of the rural landscape ; admiration for the beauty of nature ; focus on an individual's inner concerns