Scholars like Richard Eaton have observed that between the 13th and 18th centuries, pioneering Muslim holy men not only established Islam in much of south and eastern Bengal, but also played important roles in the intensification of wet rice agriculture, establishment of new modes of property rights and fundamentally altering a natural, forested ecosystem. It could also be that the reverence of the mostly Muslim forest-clearers led to the emergence of Bon Bibi as the presiding deity of the Sundarbans. In 1883, James Wise, a physician by profession and an anthropologist by vocation, noted the popularity and significance of pioneers such as Mubarra Ghazi, who is said to have converted the forested western bank of the river Hooghly into paddy land. It seems that each villager had an altar dedicated to him. No one would enter the forest, and no crew would sail through the district, without first making offerings to one of the shrines. Even now, Hindu and Muslim alike, propitiate Bon Bibi before venturing into the forest.