After this, Mr. Guthrie had occasion again to be with the army, when the English sectaries prevailed under Oliver Cromwel. After the defeat at Dunbar Sept. 3d, 1650, when the army was at Stirling, that godly man Mr. Rutherford writes a letter to him; wherein, by way of caution, near the end, he says, "But let me obtest all the serious seekers of his face, his secret sealed ones, by the strongest consolations of the Spirit, by the gentleness of Jesus Christ, that Plant of renown, by your last accounts, and by your appearing before God, when the white throne shall be up, be not deceived with these fair words: though my spirit be astonished at the cunning distinctions, which are found out in the matters of the covenant, that help may be had against this man; yet my heart trembleth to entertain the least thought of joining with these deceivers[137]." Accordingly he joined the remonstrators, and was chosen moderator at that synod at Edinburgh after the public resolutioners went out and left them. The author of his memoirs saith, "His pleasant and facetious conversation procured him an universal respect from the English officers, and made them fond of his company; while at the same time his courage and constancy did not fail him in the cause of his great Master, and was often useful to curb the extravagancies of the sectaries, and maintain order and regularity." One instance of which happened, at the sacrament of the Lord's Supper, at Glasgow, celebrated by Mr. Andrew Gray.----Several of the English officers had formed a design to put in execution the disorderly principle of a promiscuous admission to the Lord's table, by coming to it themselves without acquainting the minister, or being in a due manner found worthy of that privilege.----It being Mr. Guthrie's turn to serve at that table, he spoke to them, when they were leaving their pews in order to make the attempt, with such gravity, resolution and zeal, that they were quite confounded, and sat down without making any further disturbance. About this time that set of heretics, called quakers, endeavoured to sow their tares in Fenwick parish, when Mr. Guthrie was some weeks absent, about his own private affairs in Angus.--But he returned before this infection had sunk deep; recovered some who were in hazard of being tainted by its fatal influence; and confounded the rest, that they despaired of any further attack upon his flock.--This wild set had made many proselytes to their demented delusions in Kilbryde, Glasgow, and other neighbouring parishes; yea, they prospered so well in Glasford parish, that there is yet a church-yard in that place, where they buried their own dead, with their heads to the east, contrary to the practice of all other christians.