The sentiments and affections of a people may be learned from many little circumstances, which few people attend to. The poets and orators are generally considered as the surest repositories of popular ideas, both in ancient and modern nations. The clergy may be classed among the latter, and it is very certain, that most public preachers accommodate both their sermons and their prayers, in some degree, to the general taste of their hearers, and avoid everything which will unnecessarily give them offence. At Rotterdam, there are several English churches. The Presbyterian church, which would be the least likely, one should think, to be bigotted by England, I attended. The parson in his prayer, after petitioning heaven for the States of Holland and West Friesland, the States-General and Council of State, and for the Prince of Orange, their hereditary Stadtholder, and Governor, &c. added a petition for England, for the King, Queen, and royal family, for their health, long life, and prosperity, and added, that he might triumph over all his enemies in the four quarters of the world. At Amsterdam, I have attended both the Episcopal and Presbyterian churches, and heard similar supplications to heaven in both. At Utrecht, I attended the Presbyterian church, and there heard a prayer for the English, with much more fervor and in greater detail. The parson was quite transported with his zeal, and prayed that the rebellion, which has so long prevailed, might be suppressed, and hide its head in shame. At Leyden there is another English church. The parson, I am told, is a tory, but prudently omits such kind of prayers. This is quite a work of supererogation in the reverend zealots, and is, therefore, a stronger proof that such sentiments are popular. The English, who are very numerous in all these cities, are universally in favor of the British Ministry. But there are so many Dutch families who worship in these churches, that the parsons would not give them offence, if such prayers were offensive. This is the more remarkable, as the religion of North America is much more like that of this Republic, than like that of England. But such prayers recommend the parson to the Prince of Orange, and to the English party, and no other party or person has influence or courage enough to take offence at them. I have the honor to be, &c. JOHN ADAMS. * * * * * TO THE PRESIDENT OF CONGRESS. Amsterdam, December 25th, 1780. Sir, It is very difficult to discover with certainty the secret spring, which actuates the Courts of Europe; but whatever I can find, with any degree of probability, I shall transmit to Congress at one time or another.