This condolence letter can be used as a sample of sympathies for someone who has died of Alzheimer’s.
Dear {Recipient},
I am so sorry to hear about the death of your {relation}. I can't imagine how devastating this must be for you, especially because, having met {Deceased}, I know how important {he/she} was to this world.
I know that {Deceased} battled long and hard against Alzheimer's and that that must have been extremely difficult to deal with. Your {relation} was lucky to have you taking care of {him/her} and {he/she} will be missed by everyone who knew {him/her}.
When I learned that {Deceased} was diagnosed with Alzheimer's I began collecting my favorite memories of {him/her}, because I believed that such a bright, beautiful person's life should be preserved as much as possible. I hope they give you a smile or some small comfort in this terrible time.
{A few recollections of Deceased}.
Love,
{Sender}