On 8 Oct 1828, Charles bought land in Charlotteville Township from his father, and additional land from his brother David Wheeler Barnum on 8 Mar 1834. On 9 Jul 1839, he filed an Upper Canada Land Petition as the son of a United Empire Loyalist. He was working as a shoemaker and residing in Charlotteville Township when he witnessed a deed in 1847. He appears to have left Norfolk prior to 1852.
From 'The Loyalists in Ontario' comes the note:
"Barnum.. Nathaniel Bunnell, settled Charlotteville, his children
1. David Wheeler Barnum, got his O.C.4 Dec 1834
2. Charles D. Barnum O.C. 17 Oct 1839
3. Thomas Arnold Barnum, O.C 28 Jan 1841
4. Lois Green Barnum m. William Kimber, O.C. 3 Oct 1833
5. Henry V Barnum, O.C. 10 Mar 1834
6. James Russell Barnum, O.C. 10 Mar 1834
7. Christina Barnum m. Henry Liger, of Woodhouse, O.C. 7 Feb 1833
8. Andrew Willson Barnum of Bayham, O.C. 22 Dec 1832
9. Samantha M barnum m. James Clark of Walsingham, O.C. 6 Feb 1828
O.C. stands for "Order in Council", which means that they were now either married (if female) or over age 21, and could then claim their free land grant as a child of a Loyalist. In the case of males, it gives you a good idea of when they were born. All those with no location given were in Charlotteville, near their father.