“Tobold (II)”—the roman numeral indicates that this is the second story Walser wrote with this title — appears in my translation in Masquerade and Other Stories (Baltimore: The Johns Hopkins University Press, 1990), 80–100.
“Kleist in Thun” can be found, in Christopher Middleton’s translation, in Selected Stories of Robert Walser (NYRB Classics, 2002), 17–26. “The Battle of Sempach,” in my own translation, appears in Masquerade and Other Stories, 37–42.