[1] On the east side it is joined to the rest of the present parish of Yarrow, but formerly the parish boundary with Yarrow ran southwards from Black Law to Deer Law to Cappercleuch burn thence to St. Mary's Loch and continued down the west shore of the loch for almost one mile (1.5 kilometres) to Mare Cleuch by the Rodono Hotel.

[7] Until 1891 it was part of Peeblesshire[8] and thus part of Tweeddale, however "the water of Meggit is the only water in Tweeddale, that pays no tribute to Tweed; but runs from the south-east, some five miles [8 km], and ends its course in the bosom of St Mary Loch, and from thence, with Yarrow, watereth the wοόdy banks of the Forrest" [9] (namely Ettrick Forest – the county of Selkirkshire).

Megget is almost entirely covered with hills, which extend in two parallel ranges from west to east, having between them a narrow valley, which scarcely in any part exceeds 1⁄4 mile (400 metres) in breadth.

[10] Megget Water, rising at an elevation of 1,500 feet (460 metres), winds seven miles (eleven kilometres) east-northeastward to St Mary's Loch, on the way being joined by Cramalt, Glengaber, and sixteen other burns.

[11][12] Anciently, the vale of Megget was known as Rodonna, and formed a favourite hunting-ground of the Scottish sovereigns, until the deer were extirpated or became scarce in the reign of Queen Mary.

[13] The ancient barony of Rodonna, comprising the vale of Megget, was granted by Alexander II to Melrose Abbey in 1236.

On a tombstone found in the ruins in the mid 18th century, were sculptured a cross and sword, with the legend ' here lyes perys of Cokburne and his wyfe Marjory.'

Even in the mid 17th century there were references to Henderland and other places in Megget being described as in the parish of St Bride of Traquair, to which it would seem the district had previously belonged.

The smallness of the stipends might have been a reason, also that both parishes belonged wholly to the same proprietor, Lord Hay of Yester, and, it is more than probable, that he had considerable influence in procuring the annexation.

[24] The chapel in Megget was closed and the Free Church at Cappercleuch became the local place of worship, served by the minister of the parish of Yarrow.

These are sited on the summit of Chapel Knowe and are evidently the Kirk of Enderland, which was described in the Records of the Presbytery of Peebles in 1603 as 'altogedder down and equall wt ye erd', i.e. in a ruinous state.

[26] Although there was reference to building a church in the Act of Parliament that united the parish with Lyne,[19] it appears that the minister had to preach in farm houses in the area.