826. Chart. Ecgberht, in Cod. Dipl., V. 84. Ðonon wæst for ðonæ sealstub oð ðæt yrðland.
c. 1000. Voc., in Wr.-Wülcker, 279. Arua, yrþland.
1885. Archæol. Jrnl., XLII. 271. That slight deposit of mud from the river which is at present imperceptibly converting them from earthland into marsh.
