Probe Robbery ol Waco Mall CarrierWACO, Oct. 10.—The government was concentrating several postal Inspectors here today in an effort to solve the $9,600 robbery of Walter Cotten, star route mail carrier, yesterday afternoon.M least five inspectors had joined J. W. Adamson of Dallas, first to arrive here. Officers said the business like manner in which the robbers abducted Cotten, split the mail sacks and abstracted packages containing currency shipped from the Federal Reserve bank at Dallas to two Mart banks, indicated a probable knowledge of the shipment.