Title: Calendar of the Records of the Corporation of Gloucester. Compiled by W. H. Stevenson. Issued under the Authority of the Corporation , 1893, Gloucester, 117
Date: c 1220
Place: Gloucester

Calendar No: 209
Record No:    339

Ab. 1220. - Grant from Robert Wodie, of Wotton, to Brother Sewyn, Master of the Hospital of St. Margaret near Gloucester, and the leper brethren of the same of two selions of arable land in the field called ‘Sidenhale’ between the land of Richard of Comton and the land of Henry Passemer. Witnesses: William of the Plock; Nicholas Sygrit; Dom. Thomas, then Chaplain of the same place; Henry Passemer, of Wotton; Henry Petitcl[e]rk; William Yngeleys; Gilbert of Syde.

A selion is a medieval open strip of land or small field used for growing crops, usually owned by or rented to peasants.  A selion of land was typically one furlong (660 ft) long and one chain (66 ft) wide. However, exact measurements could vary depending on the geography of the land. The area of one furlong by one chain is one acre. Monasteries or similar institutions were often bequeathed selions and then derived an income from them by letting.   [Source: Wikipedia].