Paul Frees and Ludwig Von Drake: They've Been Everywhere Together

Just as Hanna-Barbera did very interesting publicity photos, so did Disney. Paul Frees took a lot of photos with Ludwig Von Drake. I'm curious to know if they reserved the settings for the photos, it's was a set, or if the photos were taken at the Disney lot. I imagine it was taken on the lot by a photographer. Did Disney have a employed photographer?