"Just a quick word of thanks to Mike and Greg for their efficient installation of our new wood stove.  I was on the phone when they left so did not have a chance to thank them personally.  Actually most of the time they were here I was rounding up AWOL cattle and so I was particularly pleased that they went ahead with the installation efficiently and carefully (without me looking over their shoulder).  You have a good team there!  Please give them my personal thanks for their fine work."