a executory devise to arise within the compass of a reasonable time be good  twenty nay thirty year have be think a reasonable time so in the compass of a  life or life for let the life be never so many there must be a survivor and so  it be but a length of that life for Twisden use to sa the candle be all light  at once but they cur be not for go one step far because these limitation make  the estate unalienable every executory devise be a perpetuity as far as it go  videlicet a estate unalienable though all mankind join in the conveyance per  cur Trin W I g b in the case of scattergood and edge salk vide this case Vol  Abr Eq can but this opinion do not appear there in inheritance there may be  two sort of executory devise first when the devisor part with the whole fee  out of he and after qualify the estate of the devisee and limit contingent  remainder over and this be repugnant to the rule of the commonlaw to have one  fee depend upon another Inst by Act of the party one fee can depend upon  another though it may by Act in law as it be often see since the statute of  Henry and the first of these devise that we find be wellock and hammock case  cite   Borastons case cro Elizabeth Leon and be first countenance in favour of  provision for young child and of land devisable by custom vide cro Elizabeth  and more pell and brown case cro James mich James b r Bridgman SC under the  name of pet and brown Doderidge do oppose the opinion of the other three judge  as to the point of its not be bar by recovery and the opinion in roll Rep and  sty go down with the judge like chap hay but since it have be so often pass  over it must not be question now because the estate of many depend upon it the  second sort be when the devisor do not part with the whole out of himself but  give future estate to rise upon contingency and leaves the inheritance to  descend in the mean time and this be not disagreable to the commonlaw as in  case of devise that executor shall sell land where the land descend in the  mean time and when the executor do sell it vendee be in from the first  testator and in plead must claim under he and by sell the freehold and  inheritance be by Act in law divest out of the equity case abridge er p heir  or Lord by escheat equity case abridge even out of the king if he be Lord by  escheat without petition or to point out de law vide Edward per Powell I east  will in the case of scattergood and edge I salk S c state the dictum of Powell  I thus there be three sort of executory estate one where the devisor part with  his whole feesimple but upon some contingency qualify that disposition and  limit another fee upon that contingency which be altogether new in law as  appear by I Inst a fee can be limit upon a Fee The second sort be where he  give a future estate to arise upon a contingency and do not part with the fee  at present but retain it these be not against the law for by the commonlaw one  may devise that his executor shall sell his land and in such case the vendee  be in by the will and the fee descend to the heir in the mean time a three  sort of executory devise be of term which be well settle in man a case and it  be dangerous to extend the boundary of these executory Devises which at  present be a life or life per Powel I ibidem a vide Mod S c cite