Said assessors shall, at the same time, sign and file in their office, a notice that the abstracts of individual lists are completed and filed in their office and that the property grand list of said City and of each person, partnership, and corporation named in the individual lists on file in their office, will be made from said individual lists and said abstracts will become final, unless cause to the contrary is shown to said assessors on or before the 25th day of May in said year and that said assessors will meet at their office in said City from day to day from the 20th day of May to the 25th day of May, inclusive, to hear all grievances and make corrections in said lists and abstracts and that no hearing will be had before them later than said 25th day of May.