What Do You Know About Tambour?

François-Hubert DROUAIS 1763-4. London NG. Madame de Pompadour at her Tambour Frame.I have suddenly developed a sudden and passionate interest in the craft known as tambour-work, but our regional library system has exactly 0 books on the subject. (Twitch, twitch.)

So what can you tell me about it? I am agog, all ears, etc.
OK, maybe not all ears. I’m pretty sure, judging from the picture of Mme Pompadour above, that one cannot execute tambour with one’s ears, no matter how many ears one is composed of.

What do you think?