[NTG-context] Table of Contents

I want to typeset a book with chapters and sections, but with no numbering, either on the chapter heading itself or in the TOC. I do want both chapters and sections in the TOC. I prefer the dotleader layout (alternative=c). I have spent two days now chasing down blind alleys. What is the shortest way to achieve this goal? -- John Culleton Able Typesetters and Indexers