What further is the duty of the members of each particular church, towards those of every other denomination?

It is their duty to pray for them–to exercise charity towards them–to live peaceably with them–to remember, that to their own master they must give account–while rejoicing in the truth, to hold it in love–and, as far as no sanction is given to error in doctrine or practice, to co-operate with them in every good word and work (Thomas Smyth, An Ecclesiastical Catechism of the Presbyterian Church, 27).