The film""s well-written screenplay (by Borden Chase and Charles Schnee) was based on Chase""s novel/Saturday Evening Postserialized story (in six installments from December 1946 hrough January 1947):The Chisholm Trail.He throws his newspaper to the ground and climbs on his bike to pursue hem.In the next instant, the bus roars by - predictably, he is covered with mud.At the end of the chase after running into a hay wagon - and after the "dirty trick" played on his followers, Sullivan realizes that he hasn""t really lost the trail of the land-yacht, so he bargains in a "fair" and "square proposition" for more space to go on alone until they meet again in Las Vegas in a few weeks.A grand, stately, palatial chateau [Schleissheim Castle], seen from its exterior, has been commandered by the French as their attack command center and field headquarters - French army officers live there in elegant luxury." After taunting he humans with the distasteful weapon, he hurled it into the river, and approached Malcolm with an order: "Humans leave now!" After Caesar marched off, the team began to pack up.