Well name if you can any ancient writer who mentions Adam/Eve, Cain/Abel or Noah
Isaiah.
http://www.allaboutarchaeology.org/dead-sea-scrolls-2.htm
Dead Sea Scrolls - The Book of Isaiah Over 200 fragments from the Dead Sea Scrolls are housed at the Shrine of the Book Museum in Jerusalem. Remarkably, the only fully intact scroll displayed at the Shrine of the Book is the "Great Isaiah Scroll" (1Qls-a), which contains the entire book of Isaiah that we read today -- all 66 chapters! A number of scholars, from a number of religions and professional disciplines, have analyzed this major find.
The Great Isaiah Scroll was discovered in Cave 1 in 1947. It was identified as the Biblical Book of Isaiah in 1948, and purchased by the Syrian Orthodox Church at that time. Israel reacquired the Great Isaiah Scroll in 1954 to study it and preserve it as a national treasure. It has been displayed as the centerpiece exhibit at the Shrine of the Book museum since 1965. A second partial Isaiah scroll (1Qls-b) was also discovered in Cave 1 in 1947. Since that time, approximately 17 other fragments of Isaiah scripture have been discovered in other caves at Qumran.
As far as dating, it appears that pieces of the Great Isaiah Scroll (1Qls-a) have been carbon-14 dated at least four times, including a study at the University of Arizona in 1995 and a study at ETH-zurich in 1990-91. The four studies produced calibrated date ranges between 335-324 BC and 202-107 BC. There have also been numerous paleographic and scribal dating studies conducted that place 1Qls-a at a date range of approximately 150-100 BC. (See Price, Secrets of the Dead Sea Scrolls, 1996; Eisenman & Wise, The Dead Sea Scrolls Uncovered, 1994; Golb, Who Wrote the Dead Sea Scrolls?, 1995; Wise, Abegg & Cook, The Dead Sea Scrolls, A New Translation, 1999.)
http://www.ao.net/~fmoeller/qa-tran.htm#c45
Column XLV Isaiah 54:4 to 55:8
1. (Continue Chapter 54:4) any more. (5.) For your husband is your Maker; YHWH of hosts is his name; and your Redeemer the Holy One of
2. Israel; He shall be called The God of the whole earth. (6.) because as a woman forsaken and grieved
3. in spirit, YHWH has called you, and a wife of youth, because you were refused, says [+YHWH+] your God.
4. (7.) For a small moment have I forsaken you; but with great mercies will I gather you. (8.) In overflowing wrath
5. I hid my face from you for a moment; but with everlasting kindness will I have mercy on you, says your Redeemer.
6. YHWH (9.) this is as the waters of Noah to me: which I have sworn that the waters of Noah go over no more
7. the earth; so have I sworn that I would not be wrathful with you any more, nor rebuke you. (10.) For the mountains
8. shall depart, and the hills {&H&} be shaken; but my kindness shall not depart from you, neither shall the covenant of
9. my peace be removed, says he who has mercy on you YHWH.(PP)