it is contended on the part of the plaintiff that the phrase in said section , `` and if the court shall find the right to expropriate exists , '' means simply that , if the court finds that there is some law authorizing the plaintiff to expropriate , then the courts have no other function than to authorize the expropriation and to proceed to ascertain the value of the land involved ; that the necessity for the expropriation is a legislative and not a judicial question .