The lands of Brownmuir, Brown Muir (1832)[1] or Brimmer (1821)[2] in Scots were located in the Parish of Beith, at the western boundary between East Renfrewshire and North Ayrshire, Scotland.

In 1856 a lint mill was located on the Muir Burn near Brownmuir Farm with a wooden footbridge and two dams on the watercourse.

Brownmuir or Brimmer Hill Plantation is mainly composed of oak, rowan, Scots Pine, birch and beech.

The area is very wet with a high humidity and as a consequence the habitat is characterised by a large number of Sphagnum moss hummocks which rise up as much a metre above ground level.

It may also have been used by pack animals/mule trains and was built probably before wheeled vehicles were introduced on farms in the late 18th century; large sledges were in use by farmers at this time to move heavy loads.

In 1615 William Montgomerie, a merchant, lived at Rakerfield that was situated just off the above-mentioned old drove road that once formed a direct route from Beith to Howwood.

[7] William appears in the inventory of Hew Montgomerie of Boghall, as having a claim for dry multures and he was in 1685 recorded on the roll of the Lochwinnoch heritors, as the feuar of the land of Auchinbothie-Blair.

[11] In 1648 and 1701 William Hamiltoun of Brownmuir was an elder of Beith Kirk and a feuar circa 1658 of a farm of the lands of Auchinbothie Blair.

[12] In 1796 William, seventh Lord Belhaven sold the lands and mills of Brownmuir to Hugh Crawfurd who was a baillie and a writer in Greenock.

"[12] It is also recorded that when in 1796 William Hamilton, seventh Lord Belhaven, sold the Lands of Brownmuir to Hugh Crawfurd of Greenock, mills 'plural' are mentioned as being included in the sale.