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.

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

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

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

1952 - July - The Town of Chelmsford proposes then rejects 40 Chelmsford Street as a new school building site

August - Roger Boyd purchases 40 Chelmsford Street from Ralph and Mabel Emerson

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

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

1964 - December - Roger Boyd transfers the property title to Roger Boyd, Inc.

1968 - June - Howard Brown starts doing business as Howard Brown Chevrolet

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

1969 - October - Gabby Monroe advertises as Monroe Chevy Town

1970 - December - Peter Hallissy is doing business as Hallissy Chevrolet Co.

1975 - May - Hallissy Chevrolet becomes Colonial Chevrolet

1976 - November - Roger Boyd dies on Nov 21

1977 - January - Peter Hallissy was granted a variance for an auto salesroom on the other side of Chelmsford Street

1978 - December - Roger Boyd Inc. transfers the property title to Roger's brother Ronald Boyd of Greenwich, CT

1979 - June - Larry Cunningham is doing business as Colonial Chevrolet

1980 - March - Peter Hallissy is doing business as Hallissy Subaru at 620 Middlesex Street in Lowell

July - Peter Hallissy now also operates Toyota and Chevrolet dealerships at 777 Rogers Street in Lowell

September - Larry Cunningham jumps ship and goes to Hallissy Chevrolet at 777 Rogers Street in Lowell

September - Walter Sullivan is doing business as Walter Sullivan's Colonial Chevrolet

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

1983 -January - Ronald Boyd sells the 34-48 Chelmsford Street property to Charles Parlee for commercial redevelopment

1995 - March - Charles Parlee transfers the property to J & C Management Co.

1996 - December - J & C Management Co. transfers the property title in trust to William Whitehouse (Charles Parlee's son-in-law)

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