You never get tired of peddling your horsemanure. Do you? Remember
this thread?
Here's something to refresh
your memory.
Here is one more amateurish attempt to illustrate GoI's position. The image below clearly shows the silting indicating the thalweg ('the deepest continuous line along the valley or waterway'), and hence the flow of the Hariabhanga river [red arrows].
Also there is a clear border (for the lack of better word) between the water of Hariabhanga and Raimangal rivers.
For those who do not know, where two countries share the same river that runs along their mutual border, the international boundary is deemed to run along the thalweg (i.e. the deepest point of the river). Regardless of
eastwatch's cartoonish illustration from wiki, the above satellite image indicates that the Talpatty island falls (fell ?) to the east of Hariabhanga river, i.e. on the Indian side.
The original HiRes image of the entire Sundarban can be found
here (4 mb)
But really, what are we fighting about. The island, apparently, no longer exists.