| John H. Fitzgibbon [Attributed to] Photograph Gallery - J.H. Fitzgibbon's Daguerrean Gallery n.d. Ambrotype Internet - Original source ill-defined Harvard University, Theatre collection, TL 1971.001 LL/70849 The attribution by Alan Griffiths of this ambrotype to John H. Fitzgibbon requires further research. (Alan Griffiths, 11 December 2016)
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