.letter-link {float: left; width: 340px; height: 300px; text-align:center;}
.letter-link a img {width: 157px; height: 197px;border: none; display: block; margin: 0 auto;}

.letter-link span {text-align: left;} 

.disclaimer {float: left; display: block; margin: 10px 0 0 0;}
.adobe-reader img {position: relative; top: 20px;}