The best-fit straight line through the data points for each test had a small cohesion intercept that ranged from 3 to 16 kPa. There has been much discussion in the literature about whether a sample at residual strength can have a small cohesion intercept as part of its total strength parameters. The data obtained here are not relevant to that issue, and interested readers are referred to Skempton (1985) and to the references that he cites relative to residual strength.