hi margaret, i looked for pearce or goddard but no marriage in 1768, then had a look at dec 1768 to see who got married that month, and this must be the couple you are after
banns of marriage between samuel PEARSE and mary GOODALL were lawfully published on the 16th, 23rd and 30th oct 1768 without contradiction
samuel pearse of this parish bachelor gun smith and mary goodall of the parish of st. philip in bham spinster were married in this church 26th dec 1768
samuel pearse and mary goodall signed their names and the witnesses were samson and alise dean