Brown-yes Jokes

I found this inside a old business card from
Stateside Locker Club, San Diego, CA:
In a South American mining district Mrs. Brown presented her
husband with a 12 pound baby boy. Mr. Brown was so delighted that he
went to the News office and told that he had found a 12 pound nugget of
gold as good as any to be found in South America. The paper, naturally,
sent a reporter to get particulars. This is what happened:
Reporter-Does Mr. Brown live here?
Mrs.Brown- he does.
Reporter-Is he in?
Mrs.Brown-No he isn't.
Reporter-I understand he found a nugget of gold weighing 12 pounds.
Mrs.Brown-(Seeing the joke) Yes.
Reporter-Can you show me the exact location where it was found?
Mrs.Brown-I'm afraid Mr. Brown would object as it is private.
Reporter-Is the hole far from here?
Mrs.Brown-No, it is quite handy.
Reporter-Has Mr. Brown been working the claim long?
Mrs.Brown-Almost ten months.
Reporter-Was Mr. Brown the first more...