O King & Nobility of England! Where
have you hid Fuseli’s Milton
Is Satan troubled at his Exposure
The "Society for Encouragement of Art" refers to The Royal Society for the Encouragement of Arts, Manufactures and Commerce in London. More commonly called the RSA, for Royal Society of Arts. This institution was founded to "embolden enterprise, enlarge science, refine art, improve our manufacturers and extend our commerce" in 1754.
Fuseli’s Milton Gallery in London was inspired from the success of Boydell’s Shakespeare Gallery. Rallying nationalist artistic pride, Joseph Johnson commissioned Fuseli for forty paintings, like Milton Dictating to His Daughter, which would later be rendered into engravings by other artists.
Written in pen.