They believed that a genius was this, sort of magical divine entity, who was believed to literally live in the walls of an artist's studio, kind of like Dobby the house elf, and who would come out and sort of invisibly assist the artist with their work and would shape the outcome of that work.
En genius var en gudomlig existens- -som man trodde bodde i väggarna- -i konstnärens studio, lite som husalfen Dobby. Och som kom ut och hjälpte konstnären med arbetet. Och formade resultatet av arbetet.