Hawkshaw is a pair of semi-detached houses on the River Tweed, two miles southwest of Tweedsmuir in the Scottish Borders.
A line of these towers was built in the 1430s across the Tweed valley from Berwick to its source (a few miles from Hawkshaw) as a response to the dangers of invasion from the English Borders.
Roman artefacts have also been found in the vicinity, pre-dating the tower and indicating continuity of habitation in the area for some hundreds of years.
The cairn plays host to a gathering of Porteous family members from all over the world every five years.
The September 2005 gathering attracted seventy family members from five continents, and a short religious service was followed by the laying of a wreath at the cairn, in memory of all fallen Porteous servicemen and women.