A few disconnected incidents

It was always a matter of wonder to Vandover that he was able to recall so little of his past life. With the exception of the most recent events he could remember nothing connectedly. What he at first imagined to be the story of his life, on closer inspection turned out to be but a few disconnected incidents that his memory had preserved with the greatest capriciousness, absolutely independent of their importance. One of these incidents might be a great sorrow, a tragedy, a death in his family; and another, recalled with the same vividness, the same accuracy of detail, might be a matter of the least moment.

 ...

As he looked back over his life he could recall nothing after this for nearly five years. Even after that lapse of time the only scene he could picture with any degree of clearness was one of the greatest triviality in which he saw himself, a rank thirteen-year-old boy, sitting on a bit of carpet in the back yard of the San Francisco house playing with his guinea-pigs. 

In order to get at his life during his teens, Vandover would have been obliged to collect these scattered memory pictures as best he could, rearrange them in some more orderly sequence, piece out what he could imperfectly recall and fill in the many gaps by mere guesswork and conjecture.

-Frank Norris, Vandover and the Brute