ORDINARILY a fleck of cigar ashes in the pot of mashed potatoes would not have caused a row in the ranch kitchen, but to-day old Jimmy had had a sup too much. At such times the mere sight of Matsu, the Japanese cook, could provoke him to oaths, and it was Matsu who had unwittingly dropped the ashes into the pot, as he laid his cigar stump on the shelf above the stove, preparatory to dishing up dinner.Time was when Jimmy had been the cook at Welsh's ranch, and had had it all his own way in the greasy adobe kitchen. But that was before Ben Welsh's last round-up. Since then his widow had been obliged to turn part of the cattle-ranch into a boarding camp for invalids; the part that lay in a narrow strip along the desert. Health-seekers paid better than cattle or alfalfa she found.