These are Cannons inverted and buried to act as bollards or markers between Zaoba wadi and Navi wadi in Girgaon. But the local story is that they symbolise the end of strife and beginning of peace.
In the olden days domestic help were supposed to use this staircase and enter homes through the back door. This is one of the surviving relics of that period in Chira Bazaar, Girgaon.
The St.Francis Xavier church, built in 1872 in Dabul, Chira Bazaar, Girgaon, has a bell that dates back to the 18th century and is a relic from a church in Vasai (Bassein) fort.
Thank you Siddhartha for the valuable information.
The Students' Literary and Scientific Society's Girls' High School also called Kamalabai Brahmankar Shala, after its popular principal, opened in 1848. It was the 1st high school in Bombay for girls. In 1884 the school moved to the present premises. This shows that education for girls was of great importance and was encouraged in Maharashtra in those days.
Information gleaned from Siddhartha of Awestrich
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