1William Richard Cutter, Historic Homes and Places and Genealogical and Personal Memoirs Relating to the Families of Middlesex Co., Massachusetts, Vol. 2, p. 841 (1908).
It appears that Isaac's birthdate should be January 27, 1703-4 to provide space between the births of Ephraim and Dorothy. URL = http://books.google.com/books?id=xY8sAAAAYAAJ&pg=PA841&lpg=PA841&dq=%22George+Brown%22+%22Sarah+Kidder%22&source=bl&ots=E5O_l45Hzq&sig=pFC1GKZP5uPsyLaBm0U58wmeIRw&hl=en&ei=p0kMTdWCIoWosAPSn6HaCg&sa=X&oi=book_result&ct=result&resnum=5&ved=0CCEQ6AEwBA#.
"(II) George Brown, son of William Brown (I), was born April 5, 1668, and died September 28, 1738. He took the oath of fidelity with eighteen others, March 18, 1685.
. . .
He married, January 30, 1689-90, Sarah Kidder, who was born June 1, 1667, daughter of James and Anna (Moore) Kidder, of Bellerica. She died February 27, 1717-8. Her father was a prominent citizen in civil and military affairs. Children: 1. Joseph, born November 3, 1690; married first, Mary Baldwin; second, June 28, 1733, Anne Cleveland. 2. Sarah, born March 8, 1691-2; died September 26, 1704. 3. Elizabeth, born January 12, 1693-4; died August 6, 1732; married March 28, 1721, Oliver Whiting. 4. Josiah, born April 19, 1695; married first Hannah --------; second, November 29, 1739, Mrs. Rebecca (Simonds) Danforth, widow of Thomas Danforth; third, March 1, 1748-9, Widow Mary Ellis, of Needham. 5. William, born October 21, 1696; married Mary Baldwin. 6. Mary (twin), born September 27, 1698; died November 19, 1698. 7. James (twin), born September 27, 1698; died December 1, 1698. 8. John (twin), born November 27, 1699; died December 12, 1699. 9. Thomas (twin), born November 27, 1699; died December 12, 1699. 10, Samuel, born January 27, 1701-2; mentioned below. 11. Ephraim, born January 23, 1702-3; married -------- Hosley and lived in Townsend. 12. Isaac, born and died January 27, 1702-3. 13. Dorothy, born January 1, 1704-5; married December 9, 1729, Samuel Crosby; lived in Shrewsbury, Massachusetts. 14. Sarah, born December 21, 1707; married May 19, 1741, Jacob French; she died August 16, 1765."