The Fillmore Boys School was located a few houses up from St. Claude Avenue. The avenue was on the border of Old and New Marigny. Sometime in the 20th century, St. Claude Ave was expanded, and merged with Rampart St.
I layered a modern New Orleans Square Map and the geo-coordinated Robinson Atlas from 1883. This visual shows houses that were torn down because of the road expansion. Fillmore families occupied at least three houses.