Kim,
I am very sorry.
I just lost my grandmother on January 9th.
On Dec. 31st, she was "seeing" things and calling out to her little baby who died more that 70 years ago! This baby died at 1 1/2 years old and she told us his name & that he had got a sickness and died. That was all she ever said about him (except that when he died it almost broke her and Pop-pop's hearts) and then when we'd visit NC where he was buried) we'd always go put flowers on his grave. Anyway, when we heard her shouting for him and calling to him on Dec. 31st, we felt like she may be getting close to death because sometimes people will "see" people who have passed before them when they are dying.
I hope that you are able to spend some precious time with your grandfather or talk to him on the phone or something. My Nana was 91 but it still hurts...more than I expected.
{{{hugs}}}