In 1808, a William Cochran leased the "1000 acres originally granted to Henry Denson" to Michael Keiver for 10 years. Payment was to be made every fall in firkins of butter! This is probably Thomas Cochran's son William, but Thomas also had brothers William and James.
In addition to acquiring the 1000-acre property from Denson, Thomas Cochran and his brother James had also received lots in the Amherst Grant of October 1765. In 1817, Thomas's widow Jane filed an intent to sell Thomas's lots 2 and 3 in Cumberland County Probate Court to settle some estate debts. These lots were located east of todays' highway 2 and well south of the Nappan River. The probate document, viewable online, was co-signed by a William Cochran and James Jr. Cochran. So it's reasonable to suppose that the William who co-signed was the William who leased the 1000 acres to Michael Keiver. James Jr. was probably the son of Thomas Cochran.
William George Cochran died in London in 1857 and appointed Sir James Cochran his executor. Sir James Cochran, then Chief Justice of Gibraltar, began to sell off the 1000 acres in smaller parcels. A deed from Sir James Cochran to Thomas Bacon mentions tenants neighbouring the property... Cornelius Smith, Francis Smith, James Corbet, and William Keiver. So it looks like the 1000 acres had been subdivided into smaller leases and we should expect to find lease agreements and/or sales to these tenants and others.
Bottom line...if you have ancestors who bought property east of highway 2 on the Nappan River, roughly between Smith Road and Nappan Road, see if you can trace their land deeds back to either William or James Cochran and you will have connected to the original Ripley homestead!