Hi Bluenails,
It could be a little arbitrary as to whether a former occupant was listed or not, and in this case, they don't seem to have listed any former occupants for any of the lands that bound the Messuage.
Rebecca is selling land that is "parcell of the lands and tenements appointed By the said Richard Page by his saide last will to bee Sold." So this is only part of the property to be sold.
The Messuage would be a house with the accompanying land within which it was enclosed, and Carter is buying an additional "one ffoote and a f..?? in bredth" at the Southern end, which is essentially just extending his property further south. Perhaps the "f...??" could be a furlong?
The Barn must stand immediately South of this additional land on the remainder of the Page family property.
It could be that this was an access way to the rear of the Messuage or to the Barn which was built on the plot of land to the South. Carter wishes to buy it and add it to his own plot, but as it is so near to both Barn and House, they have made an agreement to forestall any arguments over reasonable upkeep of the properties.
There may be more in a Manorial Record if they are extant, although there is no mention of whether the Land is Freehold or Copyhold, so Manor Courts might be a dead end.