Signatures to initiative petitions need not all be on one paper, but the circulator of every such paper shall make an affidavit substantially as follows: That each signature appended to the paper is the genuine signature of the person whose name it purports to be and was made by said person in his presence. With each signature shall be stated the place of residence of the signer, giving the street and number, or other description sufficient to identify the place. Each signature shall be in ink or with indelible pencil. All such papers pertaining to any one measure shall have written or printed thereon the names and addresses of at least five (5) registered voters who shall be officially regarded as filing the petition, and shall constitute a committee of the petitioners for the purposes hereinafter named. All such papers shall be filed in the office of the city secretary as one instrument.