Spencer Compton (1790–1851), 2nd Marquess of Northampton

Phillips's portrait of Spencer Compton, second Marquess of Northampton and President of the Royal Society from 1845 depicts one of the most distinguished aristocratic patrons of Victorian science—a man who combined inherited rank with genuine intellectual engagement, serving as President of the Royal Society from 1838 to 1848. Northampton's presidency coincided with the period of the Royal Society's transformation under the influence of figures like John Lubbock and the British Association for the Advancement of Science, and his portrait by Phillips served the institution's record of its leadership alongside the scientific portraits that were a significant category of Phillips's work. His combination of aristocratic prestige and scientific patronage made him an ideal subject for a painter of the establishment.

The portrait balances aristocratic dignity with intellectual engagement, Phillips rendering the marquess with appropriate formality. Scientific instruments or references to his Royal Society presidency may appear as identifying attributes. The handling is polished and competent, suitable for institutional display.