 As he later said, "I therefore held myself aloof, – determined to promote the cause of co-operation as much as in me lay, by my own efforts".He soon became involved in the burgeoning equitable labour exchange movement, a time-based currency system in which goods were exchanged on the basis of “equal value for labour through the medium of labour notes”.His journal "The Gazette of the Exchange Bazaars" (September–November 1832) was mainly concerned with explaining the theory of equitable exchange; and Mudie was highly critical of the operating principles adopted by Owen's National Equitable Labour Exchange.