Bureau Of Land Management (GLO-General Land Management Office) provides access to the Federal land records for public access lands starting in 1788. The records include patents, field survey notes, tract books etc.
Many Marylanders left the state for newly opened lands in the Midwest. With affordable prices there was a great incentive to move and start a new life. These records may allow you to establish when and where your ancestor moved to allowing you to continue your search.