Letter from Joseph P. De Youngh to Isaac Leeser;January 18, 1850Letter from Joseph P. De Youngh to Reverend Isaac Leeser regarding the collection of a debt from Mr. Jaachimsin. De Youngh also mentions the Young Men's Hebrew Benevolent Association and plans to send money to Leeser via Mr. Seixas. He requests an update on Mr. Bernall.