The Crucibellus Manuscripts were a series of eleven manuscripts on advanced up-time mathematics, released at approximately 3 month intervals beginning in November of 1631. They were written by Colette Modi, using the pseudonym "Crucibellus", and were her attempt to ensure that the names and works of the great mathematicians who would now never exist thanks to the butterfly effect would be remembered.
The Crucibellus Manuscripts covered concepts such as analytical geometry, differential and integral calculus, differential equations, matrix algebra, probability and statistics, fractals, and even Special and General Relativity and quantum mechanics. They were credited with helping to spread the idea of Grantville's reality through Europe's intellectual circles, and with inspiring some mathematicians to travel to Grantville in order to study.