“ He also acquired the necessary skill in painting figures, and returned to Germany, skilled in the rendering of many kinds of landscape forms. His pictures of French street life, done about 1843, while impressed with the stamp of the Paris school, reveal a spirit eager for novelty, quick at grasping, equally quick at rendering, momentary changes of tone and atmosphere. After 1843 Hildebrandt, under the influence of Humboldt, extended his travels, and in 1864–1865 he went round the world. ”

“ Accident made him acquainted with masterpieces of French art displayed at the Berlin Academy, and these awakened his curiosity and envy. He went to Paris, where, about 1842, he entered the atelier of Isabey and became the companion of Lepoittevin. ”