 Four years before his death, Humboldt executed a deed of gift transferring his entire estate to Seifert, who had by then married and set up a household near Humboldt's apartment.Humboldt had become godfather to his daughter.The scale of the bequest has always drawn speculation, especially as Seifert was some thirty years younger, and introducing lower class partners into households under the guise of servants was then a common practice.