He buys the leasehold on each of the 4 flats, each of which lasts for 99 years; he buys the freehold over the whole building which incorporates the 4 flats.
Mae’n prynu'r lesddaliad ar bob un o'r pedair fflat, ac mae bob un ohonynt yn para am 99 mlynedd; mae’n prynu'r rhydd-ddaliad dros yr adeilad i gyd sy'n cynnwys y pedair fflat.