Fixed l_destr() [It is embarrassing that I did not write this correctly in the first place. And doubly so that I did not catch that bug -- but it is fixed now. ^_^], l_fclose(), and l_read() now works (and has... reasonable documentation). I think l_write /may/ work, but I have not tested it. As a side note: It is interesting how much slower I ahve been writing this code without my glasses. Such a (relatively) simple instrument, yet it carries immeasurable value to me.