New York, Nov. 24. - (Special.) Police Superintendent Campbell of Brooklyn has been investigating a little of the life of Dr. Tumblety, now under arrest in London on suspicion of being "Jack the Ripper."

The Superintendent finds that during the few years that Tumblety spent in Brooklyn he conducted himself properly and attended strictly to business, but was regarded by the more sensible portion of the community as a sort of humbug who palmed off his nostrums on those who are always ready to patronize every mountebank who comes along. The doctor was a tall, well-built man, with a big flowing mustache, which was a good walking advertisement, for everybody used to ask when he appeared on the street who he was. He wore a short sack velvet coat, a velvet cap, and high top patent leather boots with his trousers tucked inside. He had a herb store at Fulton and Nassau streets with a glass case in front. Among other things in this case was a sort of glass siphon with a red liquid running through a thin glass tube to indicate blood. He was known as "The Great Pimple Banisher," and he used to promenade Fulton street with two large greyhounds and a valet.

His place was largely patronized by women of all classes.

He handed a friend of his $10,000 to keep for him one day, and this friend, after having the money some weeks, had hard work to get the doctor to take it. He was a man who delighted in notoriety, but those in Brooklyn who know him think the notoriety he is getting as the suspected slayer of the unfortunate women in Whitechapel is certainly undesirable. No one in Brooklyn believes that he is the murderer or that he knows aught about it.