A lot of widows feel that they have betrayed their spouse by continuing to live. It's deranged thinking. I know that, but that doesn't stop you feeling it.
It's a taboo subject. How the dead are betrayed by the living. We who are living--we who have survived--understand that our guilt is what links us to the dead. At all times we can hear them calling to us, a growing incredulity in their voices, You will not forget me -- will you? How can you forget me? I have no one but you.
The act of sending a letter is an act of generosity, even if, in retrospect, it might seem reckless. Why regret one's generosity? Why regret one's impulsiveness, one's misjudgment of others? The inevitable discovery that someone is selling letters you'd written in trust is simply to discover an obvious human truth: there are those who don't cherish us as we'd cherished them, and had wished to be cherished by them.