Probably settled in Woburn after marriage, as he is mentioned in the will of John Monsall, whose granddaughter he married. Mr. Monsall died March 27, 1665. He also left a bequest to John Brooks. Ephriam Buck became a man of distinction; he was the local magistrate appointed to try small cases by the general court. His grandson, Jonathan Buck, son of Ebenezer, was the founder of Bucksport, Maine, and he has thousands of descendants in Maine and northern New England through his son Ebenezer (see Bangor Historical Register).

The Buck’s Corner Historic District exists as a former agricultural node with a collection of 17th and 18th century farmhouses and barn, mid-to-late 19th century houses and their barns, and a contemporary house. The District is formed by the intersection of Wildwood and Woburn Streets and along the gently curving Woburn Street toward Lowell Street. Nicknamed “The City” early in the 19th century, the District contains six principal buildings and three barns that contribute to the architectural and historic character and integrity of the area. Most of the buildings have been altered but retain their historic design integrity. The five surviving major houses were the homes of three interrelated farming families. Five Native American sites are located within one mile of the area. Artifacts collected within this area include projectile points, cremation remains and pottery. Environmental characteristics of the district indicate a high potential for Native presence: wetlands, Maple Meadow Brook and swamplands.

Ephraim Buck's will was proved 20 March 1720
“In the Name of God Amen this twenty third day of November one thousand seven hundred and seventeen, I Ephraim Buck of Wooburn in ye county of Middlesex in this province of ye Massachusetts Bay in New England yeoman Being sick and weak of body, but of perfect mind & memory, Thanks be given unto god therefore Calling unto minde the mortality of my Body and knowing yt it is apointed to all men once to Dye, Do make and ordaine this my Last Will & Testament that is to say Principaly and first of all I Give and Recomen my soule into ye Hands of God yt gave it and my Body I Recomend to the Earth to be buried in Decent and Christian maner by my son Ebenezer Buck, He being obliged yr to bt a certain Bond or Oblegation under Hand and Seal, Nothing Doubting but that at ye Generall Resurection I shall Recive the same again by the Almighty power of God. And as touching such worldly estate where with It hath pleased God to bless me with in this life besids what I have allredy desposed of to my wife and Children by Deed of Gift under my hand and seal, I give, demise and dispose of the same in ye folowing maner and forme.
Imp. I Give and bequeath to Sarah Buck my Dearly beloved Wife all my movable Estat within doors with my Cattels, Hogs and Sheep and ye Hay and Corn to be at her own despose for ever.
Item. I Give to my two sons namly Ephraim Buck and Samuell Buck all my land and medow lying on the Northerly side of Andover Row that is otherwise Desposed of, Provided that they pay out unto the several person hereafter Named the ... sums assignd to tham in this my last will and testament. Itim I Give to my son John Buck thirty shillings to be payd to him by my two sons Ephraim and Samuell in Equiall proportion Emediatly after my decease. Itim I Give unto my son Ebenezer Buck thirty shillings to be paid to him by my two sons aforsd Emeditly after my Decease.
Itim. I Give to my Daughter Sarah Grover five Pounds to be payd unto her by my two sons Ephraim and Samuell before named Emediatly after my Decease. Itim. I Give to my Daughter Mary Spike five pounds to be paid unto her by my two sons Ephraim and Samuell afore named Emediatly after my Decease. Itim. I Give to my Daughter Eunis Buck Twent pounds to be payd unto her by my two sons Ephraim Buck and Samll Buck afornamed. Itim. I further give to Eunice Richardson yt I Brought up five pounds to be payd unto her by my two sons aforsd, in Equall proportion when she shall arrive at ye age of Eighteen years or at Her Marage if it be before that time.
Itim. I Give to my loving Wife Sarah Buck seven pounds besids what I have alredy given Her to be payd to her by my two sons before named Emediatly after my Decease and Lastly I Give to my well beloved and trusty friends John Richardson Senr and Eleazer Flagg Twenty shillings apeece to be payd to them by my two sons Ephraim and Samuell in Equall proportion, and I do by thes presence Constatute make and ordain them my said Trusty and well beloved friends, John Richardson and Eleazer Flagg my sole Exec-rs of this my Last Will and Testament and I Do by these presents Impower them to Make sale of that tract of land and meadow that I have given to my two sons namly Ephraim Buck and Samuell Buck, In Case they Refuse to tak up wuith what I have ordered and assigned them to pay in this my last Will and Testament, and they With the money to pay the several legacies afornamed as sone and I Desire them to take care of my wife and daughter Eunis & as Conveniantly may be, and I Do hereby uterly Disallow Revoke and disannull all and Every other former Testament Wills Legacies and Bequests and [?] by me in any Way before Named Willed and bequeathed Ratifying and Confirming this and no other to be my Last Will and Testament. In Wittnes Whereof I have Hereunto set my Hand and seal the day and year first above written.
Ephraim Buck
Signed seald published pronounced and declared by the sd Ephraim Buck as his Last Will and testament
In ye presence of us ye subscrobers
Benjamin Richardson
Saml Richardson

Proved by the executors at the Probate Court in Cambridge on 20 March 1720. A bond of one hundred pounds was posted by Ephraim Buck, Samuel Buck and John Richardson on 20 March 1720. On that date, John Richardson and Eleazer Flagg refused to be executors of the estate, and Ephraim Buck and Samuel Buck were appointed administrators of the estate.