1920s or in the early 1930s. The Lonely Mountain Jar Inscription, the first published Tengwar sample, dates to 1937. The full explanation of the Tengwar was published in Appendix E of The Lord of the Rings in 1955.

The Mellonath Daeron Index of Tengwar Specimina (DTS) lists most of the known samples of Tengwar by Tolkien. There are only a few known samples predating publication of The Lord of the Rings (many of them published posthumously):

* The Lonely Mountain Jar Inscription,

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