Two of Burne-Jones’ studies for his “Last Sleep of Arthur in Avalon” live in Pittsburgh. You can’t see them, or at least not very easily, because the Carnegie Museum of Art has many times the number of pieces it can display. But you can see photographs of them on line. To avoid even the appearance of impropriety (the Carnegie is jealously protective of its images), I won’t embed them, but I will link to them.
This is a study for the disposition of the central figures. By comparing this study with the finished work, you can see that Burne-Jones had already got the main idea, but made numerous changes by the time he was ready to put the figures on canvas.
This is an architectural study of the pavilion at the center of the painting. Again, the main idea is there, but the proportions changed somewhat in the finished work.
The Carnegie has a few other good Burne-Jones works, of which “The King and the Shepherd” and “The Nativity” are on display now and worth a trip to see.
