In the writing on institutional organisation and collective strike action among agricultural workers in Lowland Scotland during the early twentieth century until the outbreak of the Second World War, Richard Anthony has provided an extensive discussion on farm servants.2 However, in general, little attention has been given to casually employed workers. One such group, known as the Achill workers or the Irish ‘tattie howkers’, employed to harvest the potato crop in south-western and central Scotland, attempted to organise themselves and pursued collective strike action on a number of occasions. That group, which comprised some 1,500 to 2,000 workers, undertook strike action in 1907. That action was followed by intensive campaigns in 1918, 1919, 1920, 1921, and 1938; a further attempted strike was also reported in 1912. Much of their collective action was assisted by institutional support from unions which were already organising workers. But workers also attempted to organise themselves with the assistance of these existing unions in the years 1918 to 1921, 1925, 1926 and 1929, and to form their own union in 1909, 1910 and 1938. This paper will examine these attempts during this period.