Add spaces: Thismeritedaninvestigationbuteventuallynothingcameofit.

Answer: This merited an investigation but eventually nothing came of it.

Add spaces: firsttime,skinny,Russian08:00

Answer: first time, skinny, Russian 08:00

Add spaces: 15:27andyetoobearwitness,becauseyearewithmefrom[the]beginning.

Answer:
15:27 and ye too bear witness, because ye are with me from [the] beginning.