
1) Law book
Found on
https://www.crosswordclues.com/clue/hornbook

A hornbook is a book that serves as primer for study. The hornbook originated in England as long ago as 1450, or earlier. The term has been applied to a few different study materials in different fields. In children`s education, in the years before modern educational materials were used, it referred to a leaf or page displaying the alphabet, reli....
Found on
http://en.wikipedia.org/wiki/Hornbook
[law] In United States legal education, hornbooks are one-volume legal treatises, written primarily for law students on subjects typically covered by law school courses. Hornbooks summarize and explain the law in a specific area. They are distinct from casebooks, which are collections of cases (or parts of cases) chosen to help illustrate a...
Found on
http://en.wikipedia.org/wiki/Hornbook_(law)

rudimentary treatise
Found on
http://phrontistery.info/h.html

• (n.) A book containing the rudiments of any science or branch of knowledge; a manual; a handbook. • (n.) The first book for children, or that from which in former times they learned their letters and rudiments; -- so called because a sheet of horn covered the small, thin board of oak, or the slip of paper, on which the alphabet, digits,...
Found on
http://thinkexist.com/dictionary/meaning/hornbook/

form of children`s primer common in both England and America from the late 16th to the late 18th century. A sheet containing the letters of the ...
Found on
http://www.britannica.com/eb/a-z/h/70
Horn'book` noun 1. The first book for children, or that from which in former times they learned their letters and rudiments; -- so called because a sheet of horn covered the small, thin board of oak, or the slip of paper, on which the alphabet, digits, and often the Lord's Prayer, were written or ...
Found on
http://www.encyclo.co.uk/webster/H/61

A hornbook was a piece of wood, with a handle, onto which was pasted or placed a piece of paper containing the alphabet, nine digits and the Lord's Prayer. The paper was covered with a thin film of transparent horn (whence the name). This device was formerly used by children to learn to read, and were used in education in England from early times t...
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http://www.probertencyclopaedia.com/browse/AH.HTM

A child's primer, made of parchment, mounted on a board with a handle, protected by a transparent plate made of horn.
Found on
http://www.trussel.com/books/glossary.htm
noun a primer that provides instruction in the rudiments or basic skills of a branch of knowledge
Found on
https://www.encyclo.co.uk/local/20974

a leaf or page containing the alphabet, religious materials, etc., covered with a sheet of transparent horn and fixed in a frame with a handle, formerly used in teaching children to read. · a primer or book of rudiments.
Found on
https://www.infoplease.com/dictionary/hornbook
No exact match found.