a), b), e), f), j), n), o) Signed in Bengali and dated ''61' (upper right). c), d), k), l), m), p), s) Signed in Bengali and dated ''61' (upper left). g), i) Signed in Bengali and dated ''61' (centre right). h), t) Signed in Bengali and dated ''61' (lower right). q) Signed in Bengali and dated ''61' (lower centre). r) Signed in Bengali and dated ''61' (centre left)
