The Stevensons have been working in the woollen industry for well over a century. It started with Herbert Stevenson who used to run a woollen mill producing his own brand of Scottish tweeds on the outskirts of Edinburgh. When Drummond joined the firm, their brand of Macnab tweeds was sold throughout Europe and the US. Peter then added cashmere to the mix. Peter first went up to Inner Mongolia over 40 years ago and the Stevensons have been working with the same cashmere partners up there ever since.