Haßmersheim is a town in the district of Neckar-Odenwald-Kreis, in Baden-Württemberg, Germany. Likely to location refered to in Day By Day as Jagtfeldt. (sic Jagstfeld)

Sam’s notebook:
“Hasshersheim (?) town where we tarried & took beer & H [Twichell] went swimming above where 25 girls were & was warned away. Below this town on right bank, 200 ft up on top of the steep bank, castle of Hornberg, high old vine clad walls enclosing trees, & one peaked tall tower 75 ft high” .

Bædeker Southern Germany and Austria, 1891 Route 4 page 19 (Hassmersheim)