ADJEI v. GRUMAH Customary law—Stool land—Right of re-nty—Virgin forest land—Distinction betwen stool's right of re-entry and right of forfeiture— Need— for  hearing before forfeiture—Rationale behind right of re-entry—Presumption that A, a stranger-farmer treated as subject of stool, aware of local custom of re-entry—Whether failure to grant A hearing before exercise by stool of right of re-entry to virgin forest stool land fatal.