The book ‘Ezhavar Annum Innum - ഈഴവര് അന്നും ഇന്നും’ (Ezhavas : Then & Now) by NR Krishnan tells the story of Nangeli in detail. The book was released in Kerala in May 1960
RN Yesudas also reports this story in 1980
Only Ezhava, Nadar and Dalit women were forced to be topless. They were knows as Avarnas (Lower castes placed out of Varna system)
They could wear Mulakkacha, Chela or Kacha when they wish for, a right which was fully denied to lower caste women.
Every upper caste women had to remove their blouses while entering into temples till 1930's. Avarnas were not allowed entry inside Temple till 1930's in Travancore & 1940s in Malabar.
If i talk about Channar revolt or Velur Maru Marakkal agitation, then this Thread will never end.