Found growing on a rubbish heap at Gleaston Castle near Ulverston in the late 18th C. It was first recorded in 1793 and became one of the most popular early cookers throughout England in the 19th C. Introduced by John Sander, Keswick nurseryman, thus the name. Early season cooker mostly picked September for use in Sept/Oct. Prolific cropper even in adverse conditions. Trees are moderately vigorous, upright-spreading and fairly resistant to scab. Fruit are long & angular, pale green-yellow, often with a hairline. Flesh soft, rather coarse-textured, somewhat dry and acid, cooks to juicy cream purée.