There are LOTS of interesting materials to be found! The two main sources for all of these wonderful goodies can be seen
at Adventist Archives, and Adventist Digital Library.
Present Truth:
Issue 1 July, 1849
Issue 2 August, 1849
Issue 3 August, 1849
Issue 4 Sept, 1849
Issue 5 December, 1849
Issue 6 December, 1849
Issue 7 March, 1850
Issue 8 March, 1850
Issue 9 April, 1850
Issue 10 May, 1850
Issue 11 November, 1850
Present Truth (Just the articles, with some limited notes to help modern readers):
Articles from Issue 1 July, 1849
Articles from Issue 2 August, 1849
Articles from Issue 3 August, 1849
Articles from Issue 4 Sept, 1849
Articles from Issue 5 Dec, 1849
Advent Review:
Issue 1 August, 1850
Issue 2 August, 1850
Issue 3 September, 1850