As seen on the left, the bottom section of this large window in a grand Woburn Victorian was destroyed in the infamous 1938 hurricane,  A poor solution had been chosen to replace it.  In addition, the top half - round section was weak and in need of re-leading.

 

Eight different glass types were found to match or closely approximate those of the original panes.  The original glass is no longer manufactured.

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The design for the bottom section was drawn to align the diamond grid to that of the section above.

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The sash from the blue replacement window was reused after removal of the blue glass and the diamond muntins.

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In most light and from most angles, it is now difficult to see that the window is not entirely original