That the Babri Masjid replaced a pre-existent centre of worship, is also indicated by the fact that Hindus kept returning to the place, where more indulgent Muslim rulers allowed them to worship on a platform just outside the mosque. This is attested by a number of different pieces of testimony by Western travelers and by local Muslims, all of the pre-British period, as well as from shortly after the 1856 British take-over but explicitly referring to older local Muslim sources. A number of these documents have been presented by Harsh Narain and A. K. Chatterjee. That they are authentic and have a real proof value, is indirectly corroborated by the attempts made to make two of them disappear, which Harsh Narain and Arun Shourie independently discovered.