A catalogue is presented with variable (RR Lyrae, semiregular and Mira) stars located inside field #3 (PG3) of the Palomar-Groningen Survey at the outer edge of the Sagittarius dwarf galaxy. One of the semiregular variables is a carbon star, comparable with those found by Azzopardi et al. (1991A&AS...88..265A). Serendipity provides the suggestion, that their carbon stars might not be located inside, but behind the bulge on the Sagittarius dwarf galaxy.