paper round

Reader's Digest １月号の記事 Property Mogulからの抜粋です。
"My son Bernie, I want you to take the houses on Main Street. My daughter Sybil, you take the apartments at the east end of town. My son Jamie, I want you to take the offices over in the city centre and Sarah, my dear wife, please take all the residential buildings on the banks of the river."
The nurse and witnesses are blown away as they didn't realise the old man had such extensive holdings. As the old man slips away, the nurse says to the grieving wife, "Your husband must have been such a hard working man to have accumulated all this property."
The wife replies, "Property? He had a paper round!"
落ち分かりました？ "paper round" 意味が分からないと分かりませんよね。
・Oxford English Dictionary: A job of regularly delivering newspapers.: I did a weekly paper round in the village and every week I delivered 222 papers.
・Cambridge English Dictionary: (US paper route) the job, often done by children, of taking newspapers to people's homes