 Streatlam was rebuilt by Sir George Bowes following damage in the 16th century; the Bowes family had connections in Scotland, which may have inspired the yett construction.Since yetts were immensely heavy, and there is little evidence to suggest they were prefabricated, it is possible that many were made locally rather than transported large distances, either by local smiths or itinerant specialists.However, the yetts and window grilles of Scottish royal palaces were made to measure in the smithy of the royal artillery at Edinburgh Castle and transported to houses like Falkland Palace, Hamilton Palace and Linlithgow Palace, and some for Stirling Castle were made in Linlithgow.