ZIEGLER 1956 JOURNAL MAR 25 POINT ISABEL, CONTRA COSTA CO., CALIF. SALICORNIA MARSH AT SWEET RANGE IS ABOUT 300' WIDE (FROM ROAD TO BAY EDGE) AND PERHAPS 500' OR MORE LONG. FRESH Gopher WORKINGS SEEN IN SANDY AROUND W OF PARKING LOT. ALSO HARD GROUND OF PARKING LOT HAD OLD GOPHER HOLES & MOUNDS. MAR 29 SET OUT 50 MUS. SPEC'S LAST NIGHT AT DUSK. TRAPS SET ABOUT 20-30 FT. APART EXCEPT ON A COUPLE OF KNOLLS WITH MICROTUS(?) BURROWS WHERE TRAPS WERE 5-10 FT. APART. TRAPPING LOCATION WAS PART OF SALICORNIA MARSH JUST NE OF MAR. 25TH TRAPPING. - MOSTLY 8-10 IN. HIGH SALICORNIA WITH A FEW SHRUBS ON HIGHER (1-2FT ABOVE REST OF MARSH) GROUND. WEATHER PARTLY CLOUDY & WARM. CAUGHT 5 MUS (4 OF THEM IN THE SALICORNIA NOT ON KNOLLS) & 3 MICROTUS (ALL ON KNOLLS). DID NOT HAVE A BUNCH OF TRAPS SPRUNG AS ON MAR 25TH MAYBE BECAUSE I DID NOT TRAP IN THE RAT(?) TRAILS LEADING TO WATERS EDGE. BUT 7 TRAPS WET & MOVED AROUND BY HIGH TIDE DURING NIGHT. MAR30 SET OUT 50 MUS. SPEC'S AFTER DARK LAST NIGHT ALONG FILL-IN ROAD ABOUT 3-4 FT. ABOVE SALICORNIA MARSH (WHERE I TRAPPED YESTERDAY) PART OF TRAP LINE BORDERED DIRECTLY ON BEACH SHO. WEATHER CLEAR, WARM.