law: Registration Act, 1908
  55. Indexes to be made by registering officers, and their
  
  contents
  (1) Four such indexes shall be made in all registration offices,
  
  and shall be named, respectively, Index No. I,-Index No.II, Index NO.III and
  
  Index No. IV.
  (2) Index No. I shall contain the names and additions of all
  
  persons executing and of all persons claiming under every document entered or
  
  memorandum filed in Book No.1.
  (3) Index No. II shall contain such particulars mentioned in
  
  section 21 relating to every such document and memorandum as the
  
  Inspector-General from time to time directs in that behalf.
  (4) Index No. III shall contain the names and additions of all
  
  persons executing every will and authority entered in Book No. 3, and of the
  
  executors and persons respectively appointed thereunder, and after the death of
  
  the testator or the donor (but not before) the names and additions of all
  
  persons claiming under the same.
  (5) Index No. IV shall contain the names and additions of all
  
  persons executing and of all persons claiming under every document entered in
  
  Book No. 4.
  (6) Each Index shall contain such other particulars, and shall
  
  be prepared in such form, as the Inspector-General from time to time directs.