Hi
See attached 1887 Death Cert for Henry Kean - in case you don't already have it. He died on 6 Dec 1887 at Monkstown Avenue, in Kingstown (modern Dun Laoghaire).
Also attached Death Notice from Irish Times newspaper, 8 Dec 1887, Page 1; he was buried in Deansgrange Cemetery. Also an Irish Times advertisement from 9 Sep 1881, Page 2 for Kingstown School, 'formerly Dr. Stacpoole's'.
I hope this helps - best regards
Gerry McMahon