Complex sentence: That was only a small setback for "Nellie J. Banks" and crew she would continue smuggling until her final seize in August 1938 by the R.C.M.P cutter "Ulna" she was then towed back to Charlottetown, Prince Edward Island.
Split into simpler sentences: That was only a small setback for "Nellie J. Banks" and create; she would continue smuggling until she was finally seized in August 1938 by the R.C.M.P cutter "Ulna". She was then towed back to Charlottetown, Prince Edward Island.