Juanita I doubt there would be much remaining. Absent a sealed vault, water soaked the wooden casket and it would be gone by now. Essentially, your husband is in the ssoil surrounding the casket. There would be some remains though. Maybe more than you would expect. However, in your situation and with the time that has passed and the way he was buried, bones and clothing might be it. You would need to purchase a new casket, (they can be found online at very reasonable cost), get appropriate approvals and then begin the process. I wish you the best.