Tiberius proved himself a competent general. At the beginning he ruled wisely and competently, but soon became cynical after the flattery of senators and rumours of betrayal. He quickly declined into a bitter and reclusive old man, retiring to Capri for the remainder of his life. Caligula had him smothered with his own bed sheets as he lay deathly ill and advanced in age.

Main Roman Coin Book and Other References:

RIC = Mattingly, Harold    The Roman Imperial Coinage
BMC = Coins of the Roman Empire in the British Museum
RSC = Seaby, H A    Roman Silver Coinage
RCV = Sear, David R    Roman Coins and Their Values
Cr = Crawford, Michael    The Roman Republican Coinage
SB = Sear, David R    Byzantine Coins and Their Values
S = Coins of England and the United Kingdom
WW = Wildwinds.com (reference & attribution site)