Yes, but the early church fathers were the direct predecessors of the Apostolic ministry. The Apostles were still alive while the church was gathering on the first day of the week. One example I did not include with the previous early church writing was from the Didache, the Teaching of the Twelves Apostles, dated as written in the first century. See below.
Chapter 14. Christian Assembly on the Lord's Day.
But every Lord's day gather yourselves together, and break bread, and give thanksgiving after having confessed your transgressions, that your sacrifice may be pure. But let no one who is at odds with his fellow come together with you, until they be reconciled, that your sacrifice may not be profaned. For this is that which was spoken by the Lord: "In every place and time offer to me a pure sacrifice; for I am a great King, says the Lord, and my name is wonderful among the nations."
I have read the Didache to see if it holds up and I found a some errors within it. Here is a list of what I have found in the quick study I did of it.
Chapter 4:8 Says that when we give it is a ransom for our sins: Where does it say in scripture we are to give what we have as a ransom for our sins?
Chapter 4:11 Says we are not to say that anything is our own: Peter says that what we have is our own Acts 5:1-5
Chapter 4:19 Says we must go to Church to confess our sins: Where does it say in scripture that we must go to a building made with human hands to confess our sins?
Chapter 6:4-6 Says we are commanded to Abstain from eating food offered to Idols because by eating you are worshiping their false God's: But Paul says that eating food offered to Idols is not a sin to a man who believes. Quick study on that.
1 Cor 8- An Idol is not anything(1 Cor 8:1,4-6) and any food offered to idols is good to eat by a man who believes(1 Cor 8:1,4,7,10,11) it is only a sin to eat if it bring’s your brother who is weak in the faith to stumble(1 Cor 8:7,9-12). So long as a man believes and is strong in the faith then all meats/foods are good to eat, even if they are offered to Idols(1 Cor 8:1,6,8,13) for neither if we eat are we the better nor if we eat not are we the worse(1 Cor 8:8). It is only for our brother’s sake and conscience that we would not be able to eat any flesh/meat(1 Cor 8:11-13) not by any law(1 Cor 8:8-9).
1 Corinthians 10- It was only after the law of the Flesh that was by the Book of the Law were we not to eat food offered to Idols(1 Cor 10:18). Paul says that Idols are not anything at all(1 Cor 10:19). Paul says that all foods are lawful to eat(1 Cor 10:23) but not all things are expedient(that is to say good for him)(1 Cor 10:23). He says that food offered to idols means nothing(1 Cor 10:19), but only for Conscience sake are we not to eat(1 Corinthians 10:25,27,28), not for our conscience mind you but for that our brethren both Jew and Gentile(1 Cor 10:29,32). Because if after we have sanctified our food with thanksgiving(1 Cor 10:30) it bring our brother to sin(1 Cor 10:30,32,29,28), or it be evil spoken of (1 Cor 10:30) we do not glorify God(1 Cor 10:30,31). Everything we do should be done for God's Glory (1 Cor 10:30) and for the betterment of our brethren(1 Cor 10:24,32,33).
Chapter 7: Where are we commanded in Scripture to do these things and in this way?
Chapter 8:1-2 Says we are to limit the days we fast on: Scripture speaks of no such limitations.
Chapter 8:3-11 Says we are to say these specific words repetitively: Scripture says we are not to use prayers in vain repetitions Matt 6:7-12
Chapter 9: Says all Christians must partake of this: Scripture says that only those that judge themselves worthy and are in fact worthy may partake or else they eat and drink their own damnation 1 Cor 11:23-30
Ch 11:6-7 Says a man of God or Apostle may only stay one or two days before moving on: Where do we find this limitation in Scripture? How Long did the apostles stay in one place at a time?
Ch 11:10-11 Says we are not to test these people when they speak in the spirit: We are told to test all doctrines and spirits by God's word 1 John 4:1-3; 1 Thess 5:21;2 timothy 3:16-17; 2 Timiothy 2:15
Ch 11:14-15 "when he orders a table in the Spirit shall eat of it otherwise he is a false prophet" : Where in Scripture are we told this?
Ch 13:3-4 Says we are commanded to give the first fruit of our produce to the prophets: Where are we commanded to do this in the New Testament under grace?
Ch 13:6-7 Where are we commanded to not to speak to a neighbor who has wronged us?
After reading this I have found that it has many points which disagree with the bible and the already established word of God. That being the Case I cannot accept what is written within this Didache as the truth.