Yanito

I cruised 3 times on Britanis in the 70 s. The first / second time was with Chandris Lines on a back to back cruise from Southampton to Piraeus to Southampton in September 1971, and the third was a Western Mediterranean Cruise beginning and ending in Southampton under the Chandris Blue Sea Cruises division in August 1973. Does anyone know how or where I can find out the exact itineraries, or any other information about these early cruises?