J.T. Heald, n.d., [Store of J.T. Heald / D. Appleton selling stereoscopes and views], Stereocard, The Jeffrey Kraus Collection, LL/53005

J.T. Heald, n.d., [Store of J.T. Heald / D. Appleton selling stereoscopes and views], Stereocard, half, detail, The Jeffrey Kraus Collection, LL/53006

J.T. Heald, n.d., Backmark for "J.T. Heald, Stereoscopic Emporium, 421 Market Street, Wilmington, Delaware, Dealer in every kind of Stereoscopic Views & Instruments, Domestic and Imported.", Stereocard, back, The Jeffrey Kraus Collection, LL/53007

J.T. Heald, n.d., J.T. Heald, Stereoscopic Emporium, 421 Market Street, Wilmington, Delaware., Stereocard, half, detail, The Jeffrey Kraus Collection, LL/96854

J.T. Heald, n.d., J.T. Heald, Stereoscopic Emporium, 421 Market Street, Wilmington, Delaware., Stereocard, The Jeffrey Kraus Collection, LL/96855