campbell had mixed fortunes after leaving the army. he became interested in matters relating to british colonization of lands such as new zealand. in "excursions, adventures, and field-sports in ceylon" (preface and appendix o of volume 1 and chapter 13 of volume 2 – see bibliography below) he set out his views on colonization, including the merits of providing colonists with cheap passage, land and labour (including convict labour).