Transfers to secure debt. Notation on bond, §44-2-166. Bonds to reconvey. Transfers to secure debt. Notation on bond, §44-2-166. Burdens of registered land. Subject to same burdens as unregistered land, §44-2-141. Cancellation of mortgage, lien, equity or lis pendens, §44-2-136. Form of request to cancel, §44-2-250. Refusal to authorize cancellation, §44-2-136. Caveats.