Dorset detectives received five calls after reviving the case last month, but there are currently no developments or new lines of inquiry to follow.
They are now concentrating on carrying out detailed forensic work on the bag that the baby was wrapped in which they hope may help solve the mystery.
Officers believe that the baby was possibly strangled by its mother and thrown from a ferry from Jersey to Weymouth, before she was washed up near the Pier Bandstand in Weymouth on 15 October 1981.
