Concerning her opposition to Slavery, she is not as outspoken, even though her feelings run deeper. She knows that to make a pest of herself on this topic would cause her to be ejected from society altogether, and to lose any hope of effecting change. Those in the legal profession are well aware of the work she has done in the last few years to secure freedom for some of the Taunton maids who were enslaved by Jeffreys after Monmouth's Rebellion.

It is well that she maintains good relations with the Whigs. As you must know if you get any letters from London at all, they are close to Princess Anne, who will probably reign over England sooner or later. And they are the party of active foreign policy—or, setting aside euphemisms, of war. That wretch, King Carlos II (the Sufferer) of Spain, who has been on his death-bed for something like thirty-five years now, cannot possibly live much longer—no, really!—and when he dies there will certainly be another great war. For make no mistake. Louis XIV covets Spain, with her Empire and her mines and her mints. It must be admitted that the duc d'Anjou has as good a claim to the throne as anyone else. Never mind that he happens to be the loyal and obedient grandson of Louis XIV!

If you do not get a lot of mail, you might be saying, wait! I thought the matter had been settled by treaty, and that the Electoral Prince of Bavaria was going to be King of Spain. But he has died, suddenly and strangely. The Empire has nominated its own candidate: Archduke Charles, the younger son of the Holy Roman Emperor. There is public talk of negotiations and partition-treaties, but private preparation for war. And as the stakes of that war will be Spain, the beating heart that circulates silver and gold through the world's markets, we may expect that it will be harder-fought even than the last one.

But on to more interesting matters.

You say you would collaborate with me. I will try to dissuade you by mentioning two facts. First, it is now clear that you will be ostracized from the Royal Society if you associate your name with mine. Second, we will be working for a chap who has his minions broken on the wheel if they incur his displeasure. No, I am not talking about my new King of Prussia, but about a taller monarch who lives farther to the east and owns about half of the planet.

If I have not scared you away yet, then consider the nature of the work. The thing I want to make embodies very little that is beautiful or elegant mathematically. It will consist of two components: a mechanical system for performing arithmetickal and logical operations upon numbers, and a vast compendium of data that will inform the operations of that machine. Much work remains to be carried out on both of these fronts. The former promises more satisfaction, in that it is a practical pursuit, akin to Hooke's watch-making, and one may see the machine take shape on the workbench, and point to this gear or that shaft with a measure of pride. But I fear it is not what really demands our attention now. Think of how the art of watch-making has advanced during our lifetimes alone, beginning with Huygens's pendulums, &c., and extrapolate this into the future, and you will readily agree that arithmetickal engines will only get better with time. On the other hand—with due respect for the work that you and Wilkins did on the Philosophical Language—we have only just embarked upon the amassing of the data and the writing-out of the logical rules that will govern the machine's workings.

You are the protégé of Wilkins and the only man still living who worked on that project; on his deathbed he passed his mantle on to you. It follows that you are the man best suited to assemble and organize the data that our machine shall require, and to place it in a form that may be read and understood by a machine. This is a matter of assigning prime numbers to the symbols and then encoding them in some medium, probably as binary digits. The medium needs to be something enduring, for it may be many generations before machines can be constructed that are capable of doing the work. Best would be thin sheets of gold.

For my part, I confess I have a thousand distractions, which conspire to make me a poor collaborator indeed. Any work that demands a vast amount of un-interrupted time is impossible for me—which is why I have suggested that you, alone in your quiet Massachusetts cabin, are better qualified to draw up the immense symbol-tables.

Setting aside political entanglements, calculus-controversies, and the three Ladies (Sophie, Sophie Charlotte, and Princess Caroline) who never stop asking me to explain things to them, my chief project, at the moment, is the monadology.

At any rate, what it comes down to is that my life for the next several years will consist of flying back and forth between Hanover and Berlin (with perhaps the occasional excursion to St. Petersburg!) trying to work out a beautiful set of logical rules. That matches well with the other part of the arithmetickal engine project, namely, writing down the set of rules that will govern how it processes symbols. As a matter of fact I should like to think that these two sets of rules—the one governing monads, the other governing the mechanical mind—will turn out to be one and the same. So I propose to take on this part of the undertaking myself, as it is so similar to what I am doing anyway.

That is my proposal for how we might collaborate, Daniel, and I hope it pleases you. The Tsar is fearsome it's true, but he is far away from you, and extremely distracted putting down the Raskolniki and the Streltsy and making war on the Swedes. I do not think you need to fear him. Hard as it might be to believe, there is no monarch in the world more committed to advancing what you call the Technologickal Arts. I believe that if I were to ask him for a ton of gold, explaining that we wanted to use it to store data, he would hand it over in a moment. But first you and I need to come up with some data so that those plates will not remain as blank as Mr. Locke's tabula rasa.

Yours affectionately,

Leibniz

LATE 1700 AND EARLY 1701

Such are the Diseases and Terrors of the long Calms, where the Sea stagnates and corrupts for Want of Motion; and by the Strength of the Scorching Sun stinks and poisons the distrest Mariners, who are rendered unactive, and disabled by Scurvies, raging and mad with Calentures and Fevers, and drop into Death in such a Manner, that at last the Living are lost, for Want of the Dead, that is, for want of Hands to work the Ship.

—DANIEL DEFOE, A Plan of the English Commerce

M INERVA DROPPED ANCHOR below the burning mountain of Griga in the Marian Islands on the fifth of September. The next day the Shaftoe boys and a squad of Filipino sailors went ashore and ascended to the rim of a secondary cinder-cone on the western slope of the mountain proper. They established a watch-post there, within sight of Minerva. For two days they flew a single flag, which meant We are here, and still alive. The next day it was two flags, which meant We have seen sails coming out of the west, and the day after that it was three, meaning It is the Manila Galleon.

Van Hoek had the crew make preparations for departure. The next morning the Shaftoe boys struck their camp and came down, still coughing and rubbing their eyes from the fumes that hissed out of that cinder-cone day and night, and after splashing around gleefully in the cove for a few minutes, washing off dust and sweat, they came out to Minerva in the longboat and announced that the Galleon had commenced her long northward run at dawn.

For two days they wove a course among the Marian Islands—a chain that ran from about thirteen degrees at its southern end, to about twenty degrees at the north. Some of the islands were steep-sided volcanoes with deep water all around, but most were so flat that they did not rise more than a yard or two above the level of the ocean, be they never so large. These were belted all round with dangerous shallows, and yet they were easy to overlook in darkness or weather. So for a few days their energies were devoted to simply not disembowelling themselves on coral-reefs, and they did not see the Manila Galleon at all.