1774. Completed his survey of English jails. Stood candidate to represent the town of Bedford.
1775. Travelled to Scotland, Ireland, France, Holland, Flanders, and Germany.
1776. Repeated his visit to the above countries, and to Switzerland. During these two years revisited all the English jails.
1777. Printed his State of prisons.
1778. Travelled through Holland, Flanders, Germany, Italy, Switzerland, and part of France.
1779. Revisited all the counties of England and Wales, and travelled into Scotland and Ireland. Acted as supervisor of the Penitentiary Houses.
1780. Printed his first Appendix.
1781. Travelled into Denmark, Sweden, Russia, Poland, Germany, and Holland.
1782. Again surveyed all the English prisons, and went into Scotland and Ireland.
1783. Visited Portugal, Spain, France, Flanders, and Holland; also Scotland and Ireland, and viewed several English prisons.