from other jurisdictions upholding the application of this rule to facts comparable to those in the instant case are: Connecticut Junior Republic Assn. v. Litchfield, 119 Conn. 106, 174 Atl. 304, 95 A.L.R. 56; North v. Graham, 235 Ill. 178, 85 N.E. 267, 18 L.R.A. (N.S.) 624, 126 Am. St. 189; Slegel v Herbine, 148 Pa. 236, 23 Atl. 996, 15 L.R.A. 547.
The resolution of the question hereinabove discussed, in the manner indicated, disposes of this controversy. Clearly, when the School District abandoned its use of the property for school purposes, all of the interest which the district theretofore had in that land was automatically terminated. A plaintiff, in an action to quiet title to lands, must rely on the strength of his own title thereto; and when it affirmatively appears that such plaintiff’s rights have terminated, he is in no position to question the legality of the title claimed by others. Goodrich v. Union Oil Co., 85 Colo. 218, 274 Pac. 935.
We now turn our attention to the contention of counsel for the school district that the heirs of Russell must be determined by ascertaining who would qualify as his heirs if his death had occurred in June 1960. Some jurisdictions have adopted the rule that a possibility of reverter “rains down” upon those who would qualify as heirs of the person creating the limitation as of the time when the estate of his grantee is terminated.
King, in his work on “Future Interests in Colorado,” in this connection says:
“A much better rule, that the possibility of reverter is cast by descent upon the person’s heirs, at the time of his death, is stated in the leading case of North v. Graham, 235 Ill. 178, 85 N.E. 267, 18 L.R.A. 624.”
With this statement we agree, and the rule as set forth in North v. Graham, supra, is hereby approved.
Applying that rule to the facts of this case, all of which are agreed upon, we find that, on the death of Russell, his sole heir was his wife; she then stood in his