Jeff,
Since no one else has responded, let me add the next step; converting the value of a pound ( and thence into dollars) in 1775 to today:
The purchasing power of 1 Pound in 1775 to 1 Pound in 2013 varies based on what basis of comparison you use. I will give you two measures, CPI and labor rate based, as shown on measuringworth.com.
Adjusting 1 Pound by relative purchasing power it gives 99.5 Pounds today, by average earnings 1430 Pounds.
Converting these to dollars, the corresponding values are approximately between $154 and $2200 per Pound.
If I did my sums correctly, that means that based on comparative value of labor, the table cost about $200,000 of today's dollars.
Karl