S. Crispin, without his brother S. Crispinian, was one of those saints restored to the Prayer Book calendar in 1559 and maintained in the 1662 Book. The day must have been dear to the English because it was on this day in 1415 that Henry V triumphed over the French at the Battle of Agincourt. Shakespeare had a good Catholic memory, when he composed the famous speech of Henry V on the eve of the battle (Henry V, Act iv, Scene3):
This day is called the feast of Crispian:
He that outlives this day, and comes safe home,
Will stand a tip-toe when the day is named,
And rouse him at the name of Crispian.
He that shall live this day, and see old age,
Will yearly on the vigil feast his neighbours,
And say 'To-morrow is Saint Crispian:'
Then will he strip his sleeve and show his scars.
And say 'These wounds I had on Crispin's day.'
Old men forget: yet all shall be forgot,
But he'll remember with advantages
What feats he did that day: then shall our names.
Familiar in his mouth as household words
Harry the king, Bedford and Exeter,
Warwick and Talbot, Salisbury and Gloucester,
Be in their flowing cups freshly remember'd.
This story shall the good man teach his son;
And Crispin Crispian shall ne'er go by,
From this day to the ending of the world,
But we in it shall be remember'd;
We few, we happy few, we band of brothers;
For he to-day that sheds his blood with me
Shall be my brother; be he ne'er so vile,
This day shall gentle his condition:
And gentlemen in England now a-bed
Shall think themselves accursed they were not here,
And hold their manhoods cheap whiles any speaks
That fought with us upon Saint Crispin's day.
Their legend from the Catholic Encyclopedia: (http://www.newadvent.org/cathen/04491a.htm)
Martyrs of the Early Church who were beheaded during the reign of Diocletian; the date of their execution is given as 25 October, 285 or 286. It is stated that they were brothers, but the fact has not been positively proved. The legend relates that they were Romans of distinguished descent who went as missionaries of the Christian Faith to Gaul and chose Soissons as their field of labour. In imitation of St. Paul they worked with their hands, making shoes, and earned enough by their trade to support themselves and also to aid the poor. During the Diocletian persecution they were brought before Maximianus Herculius whom Diocletian had appointed co-emperor. At first Maximianus sought to turn them from their faith by alternate promises and threats. But they replied: "Thy threats do not terrify us, for Christ is our life, and death is our gain. Thy rank and possessions are nought to us, for we have long before this sacrificed the like for the sake of Christ and rejoice in what we have done. If thou shouldst acknowledge and love Christ thou wouldst give not only all the treasures of this life, but even the glory of thy crown itself in order through the exercise of compassion to win eternal life." When Maximianus saw that his efforts were of no avail, he gave Crispin and Crispinian into the hands of the governor Rictiovarus (Rictius Varus), a most cruel persecutor of the Christians. Under the order of Rictiovarus they were stretched on the rack, thongs were cut from their flesh, and awls were driven under their finger-nails. A millstone was then fastened about the neck of each, and they were thrown into the Aisne, but they were able to swim to the opposite bank of the river. In the same manner they suffered no harm from a great fire in which Rictiovarus, in despair, sought death himself. Afterwards the two saints were beheaded at the command of Maximianus.
"This story shall the good man teach his son."