At seven o'clock this morning we cranked up the engines only to find that the port engine temperature was rising quickly still.  So we left out of Three Rivers Lake on just the starboard engine.  Once we got out into the main Tombigbee channel we started the port engine again.  It seems to run cool while we are underway at our normal speed, but overheats at an idle.  Now Ray's theory is that maybe the belt is slipping on the water pump pulley.  Bob thinks it is the thermostat.  So they plan on checking both of those tomorrow after the engine room is cooled down.  We only encountered one tow today, down bound in a sharp curve of course.  We had to get way over to the inside of the green buoys just to stay out of his way as he was three barges wide.  It was "Ashleigh", the same tow we encountered several times last spring when we were all barely making way up stream against the flooding current.  We saw one dead alligator and one live one today.  However, it was a momentous day as Spike used his "cat tent" for the first time all day today!  I guess it just took him a while to discover it's usefulness.  Just after 1:00 p.m. we pulled in to anchor in the exact same spot we anchored in the fall on the way down at Old Lock #1.  Almost immediately we jumped in the dinghy and went to shore to take our trash and gather wood for the campfire tonight to cook dinner over.  Once we did that we were hot and thirsty so we returned to the boat.  Ray thought it was cooler on shore, so we went back and played a couple games of Yahtzee.  Around 5:00 p.m. we returned to the boat to gather all of items needed for dinner and picked up Bob and Barbara.  We had delicious Reuben sandwich hobo pies, with only one casualty.  Of course Linda made everyone a perfect sandwich, but then when it came to hers, she somehow dropped it.  Good thing we had enough ingredients to make more.  No doubt, it was s'mores for dessert!