Questions We're Left With

What does the German letter found in his pension file say?

After he mustered out in New York, why did he rejoin in New Jersey?

What details can be found about his personal life, including his birth, first marriage, second marriage, and any possible children?

This letter was found with the pension records in the National Archive. It was apparently written in the 1880's to help with a pension request. A transcription of the German cursive would be helpful. Why was a written and did it help with his request?

This letter was found with the pension records in the National Archives. It was apparently written in the 1880's by [Frederick Grey] to help with Straube's pension request. A transcription of the German cursive would be helpful. Why was it written and did it help?