Final answer:
The specific trouble George had with Marco and the crate is not detailed in the provided text, which means an accurate assessment can't be given based on the snippets alone.
Step-by-step explanation:
The trouble George had in getting Marco off the crate is not explicitly detailed in the snippets provided, and without additional context, one can only speculate based on the nature of the characters, plot, or themes described across various narratives. The text references George Hadley, a character from Ray Bradbury's short story 'The Veldt' in 'The Illustrated Man,' where themes of technology's impact on family life are explored.
It also mentions a Marcus, potentially a character from Frank Norris's novel 'McTeague,' which addresses themes like greed and the effects of unregulated desires. A possible reason for George's difficulty could stem from metaphorical expressions of conflict or obstacles, emblematic of the characters' internal struggles within their respective stories. However, without a direct excerpt explaining why George had trouble with Marco and the crate, we cannot provide a definitive answer.