law: Sale of Goods Act, 1930
  47. Seller's lien
  (1) Subject to the provisions of this Act, the unpaid seller of
  
  goods who is in possession of them is entitled to retain possession of them
  
  until payment or tender of the price in the following cases, namely:-
  (a) where the goods have been sold without any
  
  stipulation as to credit;
  (b) where the goods have been sold on credit,
  
  but the term of credit has expired;
  (c) where the buyer becomes insolvent.
  (2) The seller may exercise his right of lien notwithstanding
  
  that he is in possession of the goods as agent or bailee for the buyer.