Terentius Neo and his wife, fresco from Pompeii The wife of the magistrate holds a set of two waxed tablets which are joined together in the middle; she also holds a stylus.
Mural from Pompeii ("Sappho") A girl holding a stylus and a set of four waxed tablets which seem to be tied together along one side. (This fresco comes from the same house as the portrait of Terentius Neo and his wife.)
Roman tablet found in London, dating from around A.D. 80-120, recording the deed of sale of a slave named Fortunata. There are actually three tablets of silver fir bound together.
The Vindolanda tablets, from around A.D. 97-103, date to the Roman occupation of Britain.
Preparation of the heart is the unlearning of the prejudices of evil converse. It is smoothing the waxen tablet before attempting to write on it.
[Charlemagne] also tried to write, and used to keep tablets and blanks in bed under his pillow, that at leisure hours he might accustom his hand to form the letters; however, as he did not begin his efforts in due season, but late in life, they met with ill success.
St. Ambroise, Opuscules (Alençon, Bibliothèque municipale, ms. 11, fol. 1), 12th century
Contemporary illustrations of Hildegard von Bingen depict her using a waxed tablet. Her vision of a tree in Scivias (1165) includes a small self-portrait in one corner. A biography of Hildegard started during her own lifetime has an illustration in which she is having a vision (also here); she is poised to write on a waxed tablet, and it appears her scribe (possibly the monk Vollmar) is writing on one as well.
A bone stylus found at Jedburgh Abbey in Roxburghshire, dating from the 12th-15th centuries
His felawe hadde a staf tipped with horn, A peyre of tables al of yvory, And a poyntel polysshed fetisly, And wrooth the names alwey, as he stood, Of alle folk that yaf hym any good, Ascaunces that he wolde for hem preye.
14th century wax writing tablets from Back Swinegate in York. "These are match box sized and are complete with an iron stylus and decorated leather case. Their owner used them to jot down a curious mixture -- a document in Latin, a set of accounts and a love poem in Middle English." York Archaeology also has a more detailed description and a child-oriented webpage about these tablets.