"Your first duty among the Nestorians," said the Prudential Committee in their instructions to Mr. Perkins, "will be to cultivate an intimate acquaintance with the religious opinions and sentiments of the Nestorians. You are aware that, excepting the information collected by Messrs. Smith and Dwight, during the few days they were at Oroomiah, almost all we know concerning that sect in modern times, is derived from papal writers. The learned investigations of some of these entitle them to high honor, and may be of great use to you, in the way of furnishing topics for inquiry, but the Committee wish the information which you communicate concerning the present state of the Nestorian Church, to be the result of your own personal investigations; at least to be thus corroborated. The churches of this country ought to be accurately informed as to the number of the Nestorians, their places of residence, their doctrines, rites, morals, education, etc. Whether you will be able at present, with a due regard for personal safety, to penetrate the Koordish mountains, and visit the Nestorian Patriarch, is very doubtful. But the journey should be performed as soon as may be, lest interested and perverse men should prejudice his mind against you." After stating that they should take pains to show the Nestorians, that they had no intention of subjecting them to any foreign ecclesiastial power; and showing that the acknowledgment of the New Testament, as the only authoritative standard of religious truth, made them stand on common ground with the people to whom they were sent; it was stated, that their main object would be to enable the Nestorian Church, through the grace of God, to exert a commanding influence in the regeneration of Asia. "Concentrated effort," it was added, "is effective effort. There is such a thing as attempting too much. Many a missionary has attempted such great things, and so many, in a new field, that he has accomplished little, and perhaps nothing as he ought. Your surveys may extend over a great surface; but a richer and speedier harvest will crown your labors, if your cultivation is applied to a single field."