"No, not as far BACK," she repeated.

"Though, indeed, I often seem to remember things that happened before I was born (like Queen Elizabeth's visit to Kenilworth): I recollect so vividly all that I have heard or read about them.

But as far IN EXTENT, I mean.

I never let anything drop out of my memory.

As this case shows you, I can recall even quite unimportant and casual bits of knowledge when any chance clue happens to bring them back to me." She had certainly astonished me.