To prevent the accidental or intentional substitution of plans instead of those estimated on, and on which the estimate and contract are based, it is a good, safe practice to describe the drawings in the specifications and for the owner and contractor, or the architect and contractor, to sign them for identification. In case of after-disputes, if the case goes to court, matters are thus simplified by having as a signed part of the contract and record the plans and specifications on which the contract is based. In some specifica-cations a clause is inserted reciting that the plans and specifications are the property of the architect and must be returned to the architect before final payment will be made. This claim of the architects of ownership of the plans and specifications has been repeatedly denied by the courts, but, outside of the legal status of the case, the logical view would seem to indicate that the plans and specifications forming as they do part of the plumbing contract, as such belong exclusively to the plumbing contractor, which he should preserve for his own protection; and to ask or insist on him returning the drawings and specifications is as unreasonable as to require him to surrender his written contract of which they form part. The clause is such a senseless one, and of so little account to the architect, that it is as well omitted.