Amy...I'm so sorry for this bad news. I know for sure that your relatives will love to receive the letters you talked about. It's always so meaningful when those we love share how much they care.
I will be praying tonight for your uncle and for all your family and you too, Amy. And I will be thanking God that he brought you to this forum to share your ESH and your kind and compassionate soul with all of us. Hugs and prayers.