written authorization of the prosecutor.
The supporting affidavit of Lieutenant Detective Karkowski of the Somerset County Prosecutor's Office asserted that he had been charged with conducting gambling investigations for nine years, and had qualified as an expert witness in such matters in Somerset County courts on 16 occasions.
On November 15, 1968 he had been advised by Lieutenant Silvio Donatelli of the Middlesex County Prosecutor's Office that he (Donatelli) had good reason to believe a location in Middlesex County was being used for bookmaking purposes. He advised also that investigation revealed telephone toll records showing calls placed from the suspect location to telephone number 725-9743. On checking this number Karkowski found it to be listed for the Middlebrook Liquor Store, 966 U.S. Highway 22, Bridgewater Township. Further investigation at thattime was non-productive.
On February 24, 1969 Karkowski was in the Somerset Diner, in North Plainfield, at about 10:30 A.M. While waiting to use the public telephone there (the location of which he described), he saw an unknown male use the telephone. The caller dialed Operator, asked for 725-9743, and when connected said, "Is Bentley there?" After a pause the caller said, "Paul, Bentley. Can you get some in for me today?" Following another pause, the conversation continued, and the *524 caller placed several bets on horses racing that day at Hialeah in Florida. After a pause, the caller said, "O.K., Bentley, see you later," and then returned to the dining area. Shortly thereafter, Karkowski looked over the dining area but could not locate the caller. A check of