Given that I'm just doing this for fun, and footnoting and proper bibliographies are not my idea of fun, here's a quick source rundown. I'll be happy to answer any source-related questions I can if anyone wants/needs specifics. I should probably also mention that newspaperarchive.com and ancestry.com involve paid subscriptions; the rest of the sites listed here are free.

Newspapers:
Lowell Courier (at archive.org)
Lowell Sun (at newspaperarchive.com)
Westford Wardsman (transcriptions at www.museum.westford.org)

Public records (mostly through ancestry.com and familysearch.org):
Federal Census 1820–1920 (every ten years)
Massachusetts Census 1855-1875 (every ten years)
Assorted vital records for Massachusetts and New Hampshire: Birth, Death, Marriage, and Military
Probate papers of Stephen E. Hutchins and Warren E. Hutchins
Divorce records for Melbourne Hutchins supplied by The Commonwealth of Massachusetts, Archives Division
Cemetery maps supplied by The City of Lowell, Parks and Cemeteries
Middlesex Registry of Deeds, north (http://www.lowelldeeds.com)
Middlesex Registry of Deeds, south (http://www.masslandrecords.com/middlesexsouth)

Books (mostly through archive.org):
Hurd, History of Middlesex County, Massachusetts with Biographical Sketches, Vol. I, 1890
Hazen, History of Billerica, Massachusetts with a Genealogical Register, 1883
Johnson, Sketches of Lynn, Mass., 1880
Allen, The Shoe Industry, 1922
The Lowell Directory, 1836, 1837, 1838, 1839, 1840, 1841, 1842, 1844, 1845, 1846, 1847, 1849, 1851, 1853, 1855, 1858, 1859, 1861, 1864, 1866, 1868, 1870, 1874, 1876, 1886
Merrimack River Business directory 1872-73
Gannon, Shoemaking Old and New, 1911
Hazard, The Organization of the Boot and Shoe Industry in Massachusetts Before 1875, 1921
Contributions of the Old Residents' Historical Association, Vol. I, 1879

Books (hardcopy):
Oliphant, The Westford Gazetteer
Harde & Day, The New Old Houses of Westford 2011
Coolidge, Mill and Mansion, second edition 1993
Evans, Twirling Jennies, 2015

Organizations:
Westford Historical Society (www.museum.westford.org)
Lowell Historical Society (www.lowellhistoricalsociety.org)
Lowell Historic Board (www.lowellma.gov/559/Historic-Board)
UMass Center for Lowell History (http://library.uml.edu/clh/)

Websites:
findagrave.com
ancestry.com
wikipedia.org
commons.wikimedia.org
familysearch.org
archive.org
newspaperarchive.com
forgottennewengland.com
UMass Digital Initiatives: http://libhost.uml.edu
Library of Congress: http://loc.gov
zillow.com (Hutchins Farm at 70 Concord Rd., Westford is on the market as of this posting)