Polar explorer Adolf Erik Nordenskiöld sends minerals from Sweden for examination

"So as not to be forgotten by you as a mineralogist, I am sending you today some new mineralogical finds from Sweden. Among the specimens you will find are well-crystallized jacobsites, with a composition that appears to be almost identical to the old Jacobsberg jacobsite. You will also find some specimens of adamantine luster, white and transparent, which I am sending to the renowned mineralogist to see if he can identify them visually. I very much regret not hoping to see you this summer in Sweden, but I fully expect your visit next year. With kind regards, A.E. Nordenskiöld.".