• 1931 - Roger Boyd opened the Chelmsford Centre Chevrolet Co in May using the ground floor of Central House as a showroom with former stables in the rear serving as a garage.

• May 1941 - Tenth anniversary of Chelmsford Centre Chevrolet Co.

• Feb 1942 - Roger Boyd rents 20 Chelmsford Street from Octavia Sweetser and moves operations there

• 1942 - Roger Boyd leased 40 Chelmsford Street from Ralph Emerson and further expanded Chevrolet sales and service operations. His brother Ronald now operated Boyd's Sunoco service station at 56 Chelmsford Street

• Jul 1952 - The Town of Chelmsford proposes then rejects 40 Chelmsford Street as a new school building site
• Aug 1952 - Roger Boyd purchases 40 Chelmsford Street from Ralph and Mabel Emerson

• Feb 1954 - The Boyd Building opens at 36 Chelmsford Street, with the Newsweekly as a tenant in May

• Oct 1961 - Roger Boyd, Inc. celebrates its 30th Anniversary

• Dec 1964 - Roger Boyd transfers the property title to Roger Boyd, Inc.
• Jun 1968 - Howard Brown starts doing business as Howard Brown Chevrolet

• Feb 1969 - Gabby Monroe starts doing business as Monroe Chevrolet, Inc.

• Oct 1969 - Gabby Monroe advertises as Monroe Chevy Town
• Dec 1970 - Peter Hallissy is doing business as Hallissy Chevrolet Co.

• May 1975 - Hallissy Chevrolet becomes Colonial Chevrolet

• Nov 1976 - Roger Boyd dies on Nov 21
• Jan 1977 - Peter Hallissy was granted a variance for an auto salesroom on the other side of Chelmsford Street
• Dec 1978 - Roger Boyd Inc. transfers the property title to Roger's brother Ronald Boyd of Greenwich, CT
• Jun 1979 - Larry Cunningham is doing business as Colonial Chevrolet

• Mar 1980 - Peter Hallissy is doing business as Hallissy Subaru at 620 Middlesex Street in Lowell
• Jul 1980 - Peter Hallissy now also operates Toyota and Chevrolet dealerships at 777 Rogers Street in Lowell
• Sep 1980 - Larry Cunningham jumps ship and goes to Hallissy Chevrolet at 777 Rogers Street in Lowell

• Sep 1980 - Walter Sullivan is doing business as Walter Sullivan's Colonial Chevrolet

• Nov 1982 - Peter Hallissy invites former Colonial Chevrolet customers to visit Hallissy World of Cars in Lowell for all their automotive needs

• Jan 1983 - Ronald Boyd sells the 34-48 Chelmsford Street property to Charles Parlee for commercial redevelopment
• Mar 1995 - Charles Parlee transfers the property to J & C Management Co.
• Dec 1996 - J & C Management Co. transfers the property title in trust to William Whitehouse (Charles Parlee's son-in-law)

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