Hart resisted tinkering with his influential text in favor of a postscript

Evidence

For many years Hart had it in mind to add a chapter to The Concept of Law. He did not wish to tinker with the text whose influence has been so great, and in accordance with his wishes it is here published unchanged, except for minor corrections. — HLA Hart, The Concept of Law (Clarendon Law…, 27

Categorization

• corroborated: 2 independent passages support this claim — HLA Hart, The Concept of Law (Clarendon Law…, 27