The general if not universal limitation of the right to bring an action or to make entry, is to twenty or twenty-one years after the right to enter or to bring the action ac- crues, i. e. to twenty or twenty-one years after the cause of action accrues. As the rights and interests of different parties in real property are various, and attach at dif- ferent periods, and successively, it follows that there may be a right of entry in a par- ticular person, accruing after the expira- tion of antecedent rights at a period from the beginning of the adverse possession, much exceeding twenty or twenty-one years. Thus, if an estate be limited to one in tail, and the tenant in tail be barred of his remedy by the statute, yet, as the statute only affects the remedy, and the right or es- tate still exists, the right of entry in the re- mainder man does not accrue until the fail- ure of the issue of the tenant in tail, which may not happen for many years. The es- tate still existing in the tenant in tail or his issue supports and keeps alive the remain- der man's right of action till the expiration of twenty years after his right of entry accrues; 1 Burr. 60; 3 Binn. 374; 5 Bro. Р. C. 689; 15 Mass. 471. The laches of the owner of a prior right in an estate cannot prejudice the owner of a subsequently accruing right in the same estate; 4 Johns. 390; 8 Cruise, Dig. 408;2 Stark. Ev. 887. And where there exist two distinct rights of entry in the same person, he may claim under either. He is not obliged to enter under his earlier right; 1 Pick. 818; 5 C. & P. 563; 29 Ga. 855; 2 Gill & J. 173. Where it is necessary to prove that an actual entry has been made upon the land within a certain time before bringing suit, such entry must be proved to have been made upon the land in question; 3 Me. 316; Doug, 477; 4 Cra. 367; 11 Gill & J. 283; unless prevented by force or fraud, when a bona fide attempt is equivalent; 4 Johns. 389. If the land lie in two counties, there must be an entry in each county; though if the land be all in one county an entry upon part, with a declaration of claim to the whole, is sufficient; Co. Litt. 419; 3 Johns. Cas. 115. The intention to claim the land is essential to the sufficiency of the entry; and whether this intention has existed is to be left in each case to the jury; 9 Watts 567; 4 Wash. C. C. 367; 21 Ga. 118; 27 Ala. 864. An entry may be made by the guar- dian for his ward, by the remainder man or reversioner for the tenant, and the tenant for the reversioner or remainder man, being parties having privity of estate; 9 Co. 106; 2 Pa. 180. So a cestui que trust may enter for his trustee; 1 Ld. Raym. 716: and an agent for his principal; 11 Pa. 212; even without original authority, if the act be adopted and ratified; 9 Pa. 40. And the entry of one joint-tenant, coparcener, or tenant in common will inure to the bene- fit of the other; 10 Watts 296. Adverse possession for the necessary stat- utory period gives title against the true owner; but it must be open, uninterrupted, and with intent to claim against the true owner. The possession must be an actual occupation, so open that the true owner ought to know it and must be presumed to know it, and in such manner and under such circumstances as amount to an invasion of his rights, thereby giving him cause of ac- tion; 11 Gill & J. 371; 5 Cow. 219; 2 Pa. 438; 9 Cush. 476; 5 Pet. 438; 4 Wheat. 230; 149 Mass, 201; in Pennsylvania this rule has been announced with special distinctness. "The owner of land," says the supreme court in 1 Watts 341, "can only be barred by such possession as has been actual, con- tinued, visible, notorious, distinct, and hos- tile or adverse." See 95 Mich. 410; 97 Ala. 588; 144 U. S. 533; 69 Tex. 375; 89 Kan. 706; 84 Ky. 124; 23 Neb. 75. Title by adverse possession for a period such as is required by statute to bar an ac- tion is a fee simple title, and is as effective as any otherwise acquired; 7 Mackey 1. See 144 U. S. 533. A possession not actual, but constructive, not exclusive, but in participation with the owner or others, falls short of that kind of adverse possession which deprives the true owner of his title: 150 U. S. 597. Adverse possession must be open, so that the owner may know it or might know of it. Many acts of occupation would be un- equivocal, such as fencing the land or erect- ing a house on it; 7 Wheat. 59; 5 Pet. 402; 42 N. W. Rep. (Neb.) 915; actual improve- ment and cultivation of the soil 1 Johns. 156; building on land and putting a fence around it; 6 Pick. 172; digging stones and cutting timber from time to time; 14 East 332; 68. & R. 21; driving piles into the soil covered by a mill-pond, and thereon erecting a building; 6 Mass. 229; cutting roads into a swamp, and cutting trees and making shingles therefrom; 1 Ired. 56; and setting fish-traps in a non-navigable stream, building dams across it, and using it every year during the entire fishing- season for the purpose of catching fish; 1 Ired. 535. But e