15.64.31.13  NUMBER   - The  number  of  hists  to  fetch  when specifying
FILE=name.  This only works it the ID was specified along  with  the  FILE
name.

                                  example
     TD:SET HIST FILE=my_file IDENT=200 NUMBER=25
Fetches 25 histograms from my_file beginning from number 200.  Hist number
200 is put into data.