The song usually called "Our Sairee" was actually published as "She's Proud and She's Beau-tie-ful" with the alternative title "The Ploughboy" by FDH around the end of the 19th cent. It was written by Fred W.Leigh and George Bastow and sung by George Bastow. George Bastow was a red nosed comedian who specialized in "Country Yokel" songs including "Varmer Giles". Strangely enough the original sheet music names the lady as neither Sarey, Sarie or Saree but plain Sarah.
The lines quoted above by Billy Weekes are actually "She's PROUD and she's beautiful, She's fat and she's fair" And "Oi'd rather have Sarah than master's PRIZE pig". This is also how both Cyril Phillips and George Spicer sang it although both called the lady "Sairee".