Found Maitland's birth - attached - his parents are Maitland and Mary. He was born April 9, 1871 in Somerville, MA.
His mother's death is attached. Living in Medford, MA so she could possibly be buried in Oak Grove in Medford, MA. Her date of death is Feb 17, 1872. You could call the cemetery and ask if she is there and possibly find Maitland and Stella.
Online records for Mass are from 1841-1915. There are some for the years 1915-1920 but you can only 'browse' rather than 'search'. You could go to the Mass Archives, they have on microfilm the BMD index for the years 1915-1970. You could find their deaths that way, get the volume and page number and go right down the street to Mass Vitals and see the actual record which might tell you where they are buried. Mass Vitals charges $9 an hour for research but sometimes if you are there less they won't charge. So I use the Archives first - saves a little time.
There is also a database at Ancestry - subscription needed - for Mass Vitals to the year 1988 - not all towns/cities. You could search that database and see if you come up with anything. If you don't have a subscription you could post another message for someone to look for you.