letter
n. /ˈletər/ A1
信；信件；字母
A written message sent to someone in an envelope.
仙境例句
A letter for Mary Ann lay on the table, but Mary Ann was nowhere to be seen.
桌上放着一封给玛丽安的信，可是哪儿也看不见玛丽安。
原著这一句
The Fish-Footman began by producing from under his arm a great letter, nearly as large as himself, and this he handed over to the other, saying, in a solemn tone, “For the Duchess.
鱼仆人先是从胳肢窝下掏出一封跟他差不多大的信递过去，严肃地说：“给公爵夫人的。
卡罗尔原著 · 第 6 章