  A fit is made to the data for the proton structure function up to Q^2=10
GeV^2, including the real gamma p total cross-section. It is economical and
simple, and its form is motivated by physical principles. It is extrapolated
down to very small values of x. Data for the ratio (nu W_2^n/nu W_2^p) are also
fitted. A FORTRAN program for the fit to (nu W_2^p) is available by email on
request Figure 5 from the original version has been deleted.
