Happens a lot!
Civil registration only began in 1837, so births would not have been registered in 1730.
I guess it is a Parish Register of a baptism you are referring to.
Essex Parish registers are online on the SEAX site - it is a subscription site but I believe you can sign up just for a day or week or whatever.
With the baby's name as How, either it was a child of a son of Goodman (in which case one would have thought he would have known if his son was dead or not, but you never know there may have been an estrangement) , or more likely, the child was an illegitimate child of a daughter of Goodman, in which case the identity of the father will never be known - as the only record might have been if he was named on the baptism (which he wasn't) or if there was a bastardy bond against him for maintenance (which there wont be if he was believed dead).