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| Boston and Albany map in 1915 showing former Framingham Gas Works location of equipment at 350 Irving Street with overlay of current aerial photograph. |
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| 1979 Assessor's Map showing placement of Northeast Utilities gas tanks and equipment at 350 Irving Street. |
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| Combined maps of former Gas Companies at 350 Irving Street. Yellow markers indicate location of gas equipment in 1915. Red markers indicate location of gas equipment in 1979. |
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| 1930 Diagram map showing part of Southside. Area at bottom shows Eversource property which was then called Associated Gas and Electric Company. |