The declaration of His Highnes William Henry, by the grace of God Prince of Orange, &c. of the reasons inducing him, to appear in armes in the kingdome of England, for preserving of the Protestant religion, and for restoring the lawes and liberties of England, Scotland and Ireland : Here unto are added the letters of the aforesaid his illustrious Highnesse to the sea and land forces of England, together with the prayer for the present expedition.