sentences:  On 1 April 1849, a Postmaster became responsible for both offices, and their operations were combined although they officially remained separate until 1884.On 10 June 1853, an experimental free daily postal service for letters and newspapers was introduced between Valletta, the Three Cities, Gozo and some of the larger towns.In 1855, a wavy lines grid postmark was sent to Malta to cancel British stamps on mail sent by British military personnel during the Crimean War.