The pages you restored, which will have been marked 'restoring' by the first restore you did.
Please practice this somewhere other than production if you've never done it before. If you have access to https://www.amazon.com/SQL-Server-MVP-Deep-Dives/dp/1617290475/, I wrote a chapter on how to do page restores.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability