Can you tell us a bit more to help narrow the scope?
Working through brickwalls is similar to working a puzzle - one piece at a time, relating it to what is already completed (known). One major difference is you don't have the complete picture on the cover to help.

1. Have you found him in any records? Where was he and when? Who was with him? When did he 'disappear' from the records?
Family groups are important in a search - as is location and timeframe.

2. What information do you already have?

3. What are you looking to find? What is your main brick-wall at this time?