The consent defendant admits giving to operate the line on his property is revocable at any time. City of Kewanee v. Otley (1903), 204 Ill. 402, 413; Kellum v. Village of Greenup (1932), 265 Ill. App. 24, 26. • 13 We agree with the court in Springer that, to avoid public inconvenience, a reasonable time should be allowed the county to agree with defendant on the amount of compensation to be paid, or to condemn the property.