William Thomas Graham appears to be incorrectly described as the 2nd Viscount of Dundee
According to Cracroft's Peerage (http://www.cracroftspeerage.co.uk/dundee1688.htm) there is no William Thomas Graham who held the peerage 1st, 2nd, or 3rd Viscount of Dundee. However, Family Search has a Discovery Page contradicting this assertion calling William Thomas Graham the 2nd Viscount of Dundee: https://ancestors.familysearch.org/en/LFVC-GSN/william-thomas-graham-2nd-viscount-of-dundee-1648-1751. Are we contradicting Cracroft's Peerage? Cracroft's says the 1st was John, the 2nd James, and the 3rd David. The Peerage was dissolved after those three Grahams had the title.