What is a Gentleman? (ca. 1879) [Arsenical binding, XRF tested]

What is a Gentleman?  Boston: Loring, Publisher, Corner of Bromfield and Washington Sts., [ca. 1879]

(165 x 125 mm). pp. 76. Darker green publisher’s cloth binding with gilt gitle placard and black ornamentation. Some scuffing to binding along foredge side and hinge of spine; bumping to spine. Interior clean.

I ask myself this all the time. Written as an epistolary book, with letters to Harry from his Mother, this late-19^th century etiquette book is a jaunty, gentle guide for young gentlemen of yesteryear. Or perhaps a how-not-to, if you’re into being a bad boy. Picked up under “Self-Help” section of used book store. 

XRF tested (07/26) with evidence of arsenical compound in binding. See graph