Dan was my favorite constructor and we had exchanged a number of emails some months back in which he said he was ill and was at times disspirited, but he was most open and enjoyed teasing me about my being a Yankees fan --- he liked Baltimore. Despite his illness, he managed to make a great many puzzles, always with clever themes and always among the best. I will miss them and his wit.
My condolences to his family and to crosswords enthusiasts across the nation.
Magus