First. That they will make, compile, collate, prepare, correct and copy complete in every respect for printing two sets of original Index Books, one of grantors, and one of grantees, each of which shall contain the names of grantors and grantees respectively, together with the dates of the instruments, the time when recorded and the title and page where recorded of all instruments, deeds, leases or other writings recorded in the libers of conveyances in the said register’s office, at the date of this contract, in consideration of the sum of thirty-two dollars for each volume of conveyances so indexed.