This postcard of 'Les Derviches Tourneurs' (the whirling Dervishes) was sent in November 1904 from the British Post Office in Constantinople, to a Miss Lettice East.
The postcard was unsigned, so we can only presume that Lettice would've have known who the sender was. Looking up Miss Lettice on the 1911 census, shows her still living at the address the postcard was sent to in 1904 (in a house with 21 rooms, and at the time of the census their household had 7 servants and a governess to look after their family of 5). She would've been aged 8 when the card was sent, and I wonder if it was from her father who was retired from the Bombay civil service. Lettice didn't marry and died in 1953, aged only 57.
If you ever get the chance to watch the Whirling Dervishes, I would recommend it.