"The translated Indian texts would naturally have gone first to the Jesuit general. There is ample circumstantial evidence that did happen. Christoph Clavius, who authored the Gregorian calendar reform, also published in his name a table of sines in 1607. Curiously, these were the so-called Rsines, in that they explicitly involved the radius of the circle. Simon Stevin follows the same practice for his secant tables. Curiously, Clavius used the same large number for the radius as used in Madhava’s values (Clavius 1607). Documentary evidence of a connection comes from Clavius’ student Matteo Ricci who visited Cochin just prior to the Gregorian reform to get information about Indian methods of timekeeping (Ricci 1581). The Indian timekeeping or astronomy texts near Cochin contained detailed accounts of the calculus. On the epistemic test, those who copy don’t fully understand what they copy. This is also evidence of transmission: Clavius got the imported sine values explicitly interpolated to build a larger table, but did not know enough trigonometry to calculate the size of the earth. Recall that this size was routinely mentioned in Indian texts, and that the size of the earth was a key parameter needed for determining longitudes. (The calendar reform only settled the problem of latitudes.)"