I now think the Pritchard connection is a red herring Annie. Looking at the 1901 image, numbers 72 and 74 Rockfield are clearly separate households.
My guess is that Emily Stead completed the forms showing her father as Head ( of the household, not his name!), but with a note to the effect that he wasn't actually there on census night, so the enumerator ignored the absentees but transcribed the rest of the entries faithfully. Hence there is no Head of the household at 74 Rockfield. It starts with Emily as Daur. (the later mistranscription of Stead as Head is another story)
But who was Elspet the nurse?