Hello Chris, There is a James Slater listed on the 1859-1860 Electoral Roll for the Lower Hunter electoral district of Sinclair Point."Sinclair's Point" appears on today's Govt. Topographic map of the Maitland District; located on the Eastern side of the Williams River, 2.5 kms North of the village of Seaham.The present Seaham to Glen Oak Road runs right along the Western side of the River opposite "Sinclairs Point." Named after Peter Sinclair who was granted the land (1050 acres) in 1823, but he became indebted & the land was sold in 1825.The land was further subdivided in the early 1870s. Listed in the 1867 Post Office Directory for Seaham is Grace Slater, Snr & Thomas Slater Jnr, both farmers of Sinclairs Point.The local Newspaper of the time, the "Maitland Mercury" is available to peruse online, you may be able to find something about the 1851 abduction from there, if you haven't already done so. In 1919, the following were eligible to vote in the Seaham Polling Place;- Evelyn H. SPARKE, Domestic Duties, Leslie R.SPARKE, Farmer & Stanley SPARKE, Labourer. Descendants, perhaps?? The Local History Section of the Newcastle Regional Library in Laman Street Newcastle would have a copy of the Electoral rolls; perhaps you could contact them online (Google) & since you are only paying a fleeting visit from such a distance, they may be able to do some further research before you arrive. I hope this helps a bit, please contact me should I be able to help any further. Regards, from a warm & sunny, but very dry Hunter Valley, Ian Wright.