It took an alligator named Paul 4 hours to walk from his home at the River Nile to the Nile Delta.  On the return journey, Paul traveled with six other alligators, the journey taking 2 more hours than Paul took to walk to the Nile Delta, to reach their home at the River Nile. What's the combined time the alligators walked?
Please reason step by step, and put your final answer within \boxed{}.
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