A friend posted in facebook this 1938 postcard. Very nice photo indeed except it is not the mountain and river that we Tamsui-lang know of. Not only the mountain profile is entirely wrong, we have never seen corrosion of the mountain to this extent. Plus (1) on the far right, another mountain looms behind while no such mountain exists in Tamsui, (2) the river delta, a prominent landmark, is also gone, and (3) no small fishing sampans in Tamsui River were ever equipped with a sail (only transports with a mid-ship canopy and those from Foochow did).
Even though the caption reads Guyanyin Mountain and Tamsui River, this ain't it.