Letters from the lords of Her Maiesties most honourable Priuie Counsell for the furnishing and supplying of horses in all townes where the postes are established, for the reliefe of the postes there, and furtherance of Her Maiesties seruice : directed to all maiors, shiriffes, iustices of the peace, bailifes, conestables, hedborowes and all other Her Maiesties officers ...