This first day cover was issued to mark 190 years of Sri Lanka’s survey department and features Captain Gualterus Schneider alongside a commemorative stamp. What’s interesting however, is that the text stating that Captain G. Schneider was the first surveyor general of Sri Lanka appears to be a mistake.
The stamp shows that the Survey Department was established in 1800 which is accurate. The surveyor general at the time was J. Johnwil who was followed by George Atkinson in 1805. Gualterus Schneider then happens to be the THIRD surveyor general coming into office in 1811.