The Lowell (MA) City Directory of 1918 "containing a General Directory of the citizens, house directory, business directory, street directory and record of the city government, institutions, etc." And, I recently discovered there is a listing of 2,100 "Lowell men in the service of the United Stated and her Allies in the Great World War." Although I don't have any ancestors from Lowell, I thought this list provided useful information. There are 18 scanned pages, and the first one describes how the information was obtained. The names are in alphabetical order and I made the pages extra large for easier reading (however, some won't enlarge). In 1918 there was a population of approximately 115,000 people.