Hartshorn, Harts horn, Stag horn

If you want to make hartshorn
Take the horn when they are soft and boil them and cut them into [slices?] as much as you like or can get of the antler. Take honey and boil the impurities out of it, then take gingerbread and sieve it. [ ] that you can not get you take and chop finely. Add honey and ground gingerbread and the hart's blood and pass that through a cloth. Place the antler in it and boil it.
From a cookbook from the archives of the Teutonic order, 15th Century, Translated by Volker Bach.

The Closet of Sir Kenelm Digby Opened 1669 several gelly p239-242
May, Robert. The Accomplisht Cook. 1685 jelly 207

Court Cookery. Robert Smith 1725 - Jelly
The Cooks and Confectioners Dictionary John Nott 1726 Blanc-manger of Harts-horn, jelly, Almond cream
The Compleat Housewife. E. Smith 1739 - Flummery, clear wine; calf's without lemons
The compleat confectioner. Mary Eales 1742 - Jelly, Flummery
The Art of Cookery, Made Plain and Easy. Hannah Glasse 1774 - stag's heart water; 2 flummery
The Lady's Assistant . Mason 1777 - Imperial cream, jelly, welsh flummery
The Art of Cookery, Made Plain and Easy. Hannah Glasse 1784 - 2 flummery
Experienced English Housekeeper. Elizabeth Raffald. 1786 - Jelly, cream
The Universal Cook By Francis Collingwood 1792 Flummery Cream Jelly

The Domestic Encyclopaedia . James Mease 1804 - info
Complete Confectioner. Frederick Nutt 1807 - Jelly
Modern domestic cookery. 1819 - Foot jelly, split
Frugal Housewife. Susannah Carter 1823 - clear wine
A Modern System of Domestic Cookery. M. Radcliffe 1823 - jelly
Cook's Oracle. William Kitchiner 1823 - compare with calf; Jelly, Flummery, crab eyes
Domestic Economy and Cookery. 1827 - Flummery, Jelly
Mackenzie's Five Thousand Receipts. 1829
A Dictionary of Mechanical Science, Arts. Alexander Jamieson. 1829 ...now chiefly prepared from bones
The Cook's Own Book. NKM Lee. 1832 - Hartshorn cream
The Cook's Dictionary, and House-keeper's Directory. Richard Dolby. 1833 - Cream, Flummery, Jelly
Tegg's handbook for emigrants. Thomas Tegg 1839 - to clean silver
Cottage comforts. Esther Copley 1841 - Jelly, Is jelly with milk
The Epicure's almanac . Benson Earle Hill 1842 - Ruby Jelly, with amber calf's foot jelly
The Domestic Dictionary . Gibbons Merle, John Reitch 1842 - Shavings
The Lady's Own Cookery Book Charlotte Bury. 1844 - Blancmange, Jelly, Flummery, Hedgehog, Wine Jelly
An Encyclopędia of Domestic Economy Thomas Webster 1845 Gelatins
Modern Domestic Cookery. William Augustus Henderson 1847 - Cream, Jellies
Kettner's Book of the Table By Eneas Sweetland Dallas 1877 laugh
Dr. Chase's Recipes. Alvin Wood Chase 1888 - Federal Cake

Food...Sources, Constituents and Uses. By Arthur Herbert Church 1903 Gelatine
Greenbaum, Florence. International Jewish Cook Book. 1919 - Old-Fashioned Hamburger Cookies

History. Prospect Books - Glossary
History. Food Timeline - Ammonia Cookies