(a) When a record has been burned or otherwise destroyed, its contents may be proved by secondary evidence which does not disclose the existence of other and better evidence.

(b) If the registry has also been destroyed before a copy of an original paper has been made and certified, any secondary evidence shall be admissible to prove the original and its registry which does not disclose the existence of other and better evidence.

(c) If the original is found to have been recorded and it does not appear whether it was done on proper probate, the court shall presume, until the contrary appears, that the same was done on proper probate.