William Louis Sonntag, Boathouse on the East River William Louis Sonntag (1822 – 1900) Boathouse on the East River Share this post:Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to email this to a friend (Opens in new window) TagsWilliam Louis Sonntag Share