In Holley v. Young, 66 Maine, 520, the plaintiffs leased the premises to the defendant for one year at a rental of $75 a year and then added the following : "We further agree to lease to said Young said premises at the price and conditions named as long as he wishes to occupy them.” The tenant remained after the expira*187tion of the year, and the court held that his so remaining was an election to continue the tenancy. "The question, whether a written instrument is a lease or only an agreement for a lease, said the court, quoting from Kabley v. Gas Light Co., 102 Mass. 392, "depends on the intentions of the parties to be collected from the whole instrument.” Bacon v. Bowdoin, 22 Pick. 401. The form of expression " ‘We agree to rent or lease is far from being decisive on this question, and does not necessarily import that a lease is to be given at a future day.” So in Kramer v. Cook, 7 Gray, 550, the agreement was "to hold for the term of three years, and at the election of the defendant for the further term of two years, and the court said : "The provision in the lease is not a mere covenant of the plaintiff for renewal; no formal renewal was contemplated by the parties. The agreement itself is, as to the additional term, a lease de futuro. . . all that is necessary to its validity is the fact of election.