We learn that the pretext upon which these conversions of folcland into bócland were made at first, was the erection and endowment of a religious house upon the land, by the grantee; and we also learn that sometimes the conversion was made, the thane presented with the estate, but the church or monastery not constructed. Soon after the introduction of Christianity into Northumberland, it appears indeed to have been customary to grant much greater privileges and immunities to church-lands than were found advisable at a later period, or than seem to have been permitted in the provinces south of the Humber. It stands to reason that there could be no reversion in lands granted to a corporation: hence folcland which had been presented to a church assumed what may be called a hereditary character[549], and could only lapse by total destruction of the particular body,—a circumstance which could obviously never be contemplated, but which did actually occur during the civil wars, internal dissensions and foreign invasions, which gradually changed the face of the whole country[550]. But the lands which the Northumbrian princes devoted to pious purposes, were most likely relieved from all burthens whatsoever: we have conclusive evidence that even military service was excused in that district before the time of Beda. In all probability, it was not suspected how much the defences of the country might become impaired by grants of the kind. The passages already cited from Beda’s epistle to Ecgberht may be adduced in corroboration of these assertions, but we have more direct evidence in his history[551]. Oswiú on his conversion placed his daughter Eánflǽd in the convent presided over by Hild, and with her he gave twelve estates, “possessiunculae terrarum,” most likely folcland, each estate comprising ten hides; in which, Beda continues, “Ablato studio militiae terrestris, ad exercendam militiam coelestem locus facultasque suppeteret,”—or as the Saxon translator expresses it, “Those twelve bóclands he freed from earthly warfare and earthly service, to be employed in heavenly warfare.” It is very clear that the duties of military service were removed in this case, and that religious warfare was to be the destination of those that held the lands. Similarly when Benedict Biscop decided upon devoting himself to a monastic life, he surrendered his lands to the king[552]. These must obviously have been folcland, the retaining of which he considered impossible, under the circumstances; and which, not being his own, he could not take with him into a monastery: “despexit militiam cum corruptibili donativo terrestrem, ut vero regi militaret;” and these words of Beda clearly show how we are to understand what he says of Oswiú's grant to Whitby. ----- Footnote 549: Land is sometimes called Bishop-land, which I imagine to be the legal designation of this particular estate. Footnote 550: