It should be noted that in addition to the plans and sections “an estimate of the probable cost” must also be prepared by the surveyor, and this must be very carefully prepared, for it has been held to be a “condition precedent to the recovery of the expenses, that such estimate should have been properly made” (_Vide_ ‘Fitzgerald’ p. 160, 3rd edition). No mention is however made in the Act of a specification, which is of course absolutely essential. It may here be of use if I give a specimen form of notice to be served in connection with carrying out the duties involved by this clause; of course each town surveyor must alter the work specified to meet the requirements of the case; _To the Owner or Owners of certain premises fronting, adjoining, or abutting upon a certain street, called              in the parish of          in the borough of            in the county of         _ Whereas the said street is not levelled, paved, metalled, channelled and made good to the satisfaction of the mayor, aldermen and burgesses of         , the urban sanitary authority of the above-named borough: And whereas your said premises front, adjoin, or abut on certain parts of the said street which requires to be levelled, paved, metalled, channelled and made good as aforesaid: Now therefore, the mayor, aldermen and burgesses of         , the urban sanitary authority of the said borough as aforesaid, hereby give you notice (in pursuance of the statute in that case made and provided) to level, pave, metal, channel and make good the portion of the said street in which your said premises front, adjoin, or abut as aforesaid, within the space of one month from the date hereof, in manner following, that is to say: (_If a sewer is to be formed, fill in this first._) The carriage-way and water tables thereof to be formed in the mode, according to the sections, and on the levels and at the rates of inclination shown upon the plan, sections, and in accordance with the specification of the work prepared by the surveyor to the said urban sanitary authority, and now open for public inspection at his office,          during the usual office hours. The carriage-way to be bottomed, formed, and carefully levelled up to the form shown by the said sections; and in the following manner: (_Here fill in specification of method._) Construct        gullies, fitted with five-bar cast-iron gratings and frames of the form and pattern to be seen at         , these gullies to be placed in such positions as are shown on the aforesaid plan and sections; each gully to have a six-inch glazed stoneware socket-pipe drain connecting it with the sewer, to be laid on a solid bed, and at an uniform inclination from gully to sewer, with joints made of neat Portland cement.