File:Sketch of Lingtu Fort, Sikkim in 1887.png
![File:Sketch of Lingtu Fort, Sikkim in 1887.png](https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Sketch_of_Lingtu_Fort%2C_Sikkim_in_1887.png/800px-Sketch_of_Lingtu_Fort%2C_Sikkim_in_1887.png?20171010033723)
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