David is surprised to find Anna in the basement. This is a violation of his privacy. In his dialog with Anna, his tone is that of anger. Although Anna was hopeful that David might have met Jane before she was murdered, he denies seeing her at the house when he worked for Alistair. The author hints at the memory loss of Anna when she once again enquires whether David had heard the scream. In his response, David states that he had already told her that he did not hear the scream. The partial memory loss of Anna is as a result of her medication.