1919 (2 Apr) OHMS 'NOTIFICATION of a case of/INFECTIOUS DISEASES' lettersheet posted at Melbourne without stamp, and with oval 'T1½D', 1912-23 Wmk Crown over Double-lined A Thin Paper ½d and 1d Postage Dues affixed and tied by faint 'L.C. ROOM/MELBOURNE' datestamps. Fine and a scarce deficiency rate