1. There are many ecclesiastical matters which are of common concernment to many single congregations, as trial of church officers, ordination and deposition of ministers, dispensation of censures, judicial determination of controversies, resolution in difficult cases of conscience, ordering of things indifferent, &c.; here the rule holds well, that which concerns many congregations, is not to be considered and determined upon only by one, but those many concerned and interested therein. 2. Single congregational elderships stand in need of all mutual help and assistance one of another in the Lord, being, 1. Inwardly weak in themselves; too prone to be turned out of the way, Heb. xii. 13, Gal. v. 15, and too feeble for divers great tasks: as examination and ordination of ministers, &c., which weakness is healed by association with others assisting them. 2. Outwardly opposed by many dangerous and subtle adversaries: men as grievous wolves, &c., Acts xx. 28-30; 2 Pet. ii. 1; Phil. iii. 2; 1 Tim. iv. 1-7; Eph. iv. 14; devils, 1 Pet. v. 8. In such cases two are better than one: "Wo to them that are alone; if they fall, who shall take them up?" 3. Such intricate cases may fall out as cannot be determined and settled by the eldership of a single congregation. As for instance, some member in the congregation may conceive himself so wronged by the eldership thereof, that he cannot submit to their unjust sentence; shall he not in such case have liberty of appeal from them? If not, then he is left without a remedy, (which is the calamity of the Independent government.) If he may, whether shall he appeal regularly but to an associated presbytery? therefore there must be such a presbytery to appeal unto. Again, there may be a controversy betwixt the whole congregation, and their presbytery; yea, the presbytery itself may be equally divided against itself; yea, one single congregation may have a great and weighty contest with another sister congregation, (all single congregations being equal in power and authority, none superior, none inferior to others.) Now, in these and such like cases, suppose both parties be resolute and wilful, and will not yield to any bare moral suasion or advice without some superior authority, what healing is left in such cases, without the assistance of an authoritative presbytery, wherein the whole hath power to regulate all the parts?