I don’t exactly make a habit of picking up rocks and bones and bringing them home.  I have heard of a guy who makes a habit of carrying rocks in his backpack (big heavy ones) and placing them back on mountain tops, as his way of countering erosion everywhere.  That sounds like even harder work than bringing them down off the mountain to put on one’s fly tying desk. I have done that very seldom. Three times in fact (if memory serves).  These three idiosyncratic  items serve to  centre me in an obscure metaphorical way.  There are three of them