By the Lords and Commons assembled in Parliament : instructions, rules and directions, to be observed & put in execution by Collonel Martin Pinder, Harcourt Leighton, Thomas Harbert, and Captaine Iohn Potter, esquires, and commissioners of Parliament in the army, established by both Houses of Parliament, under the command of Sir Thomas Fairfax, knight, commander in cheife, and all other persons whom these instrutions &c doe or may concerne.