She was a main editor of Vol 4 of the letters of Charles Dickens ( Pilgrim Edition ) which was published in 1977 .
Working with John Butt she published ' Dickens at work ' in 1957 and edited ' Oliver Twist ' in 1966 .
She was a main editor of Vol 4 of the letters of Dickens   ( Pilgrim Edition ) which was published in 1977 .
Working with John Butt she published ' Dickens at work ' in 1957 and edited ' Oliver Twist ' in 1966 .