Alexander Biddle was a member of the prominent Philadelphia Biddle family and was married to Julia Williams Rush, the granddaughter of Dr. Benjamin Rush. Biddle served with the 121st Pennsylvania Volunteer Infantry, beginning in September 1862. Starting out as a major, he would participate at Fredericksburg and Gettysburg, among other engagements, and would leave the service as a lieutenant colonel. (He was commissioned, but never mustered, as colonel) 
Transcript:
Sunday Dec. 28th, 1862
Dear Julia,
We are all in Camp at the old ground near White Oak Church – to day I heard your box per Sanitary Comm. was at Acquia Landg. and have sent over out ambulance to procure it and some medical stores and have no doubt but that I shall succeed. One of our Captains Wrigley has this morning recd. leave of absence for 9 days from 1st January and I shall ask him to call on you. He was formerly a policeman. You will find him a little rough perhaps in appearance but he is in every respect a good soldier and man –much better than many of more external polish. If you have anything to send do it by him. I was greatly pleased with your bag which came on Christmas so don’t send me anymore of that until I write to you. I feel quite set up again with my private store which sometimes have been an amazing help. I see in the Inquirer of the 25th a letter which must have been written by Rosengarten in which he gives me a little puff Everyday I hear of new incidents of marvelous escape – one man was shot through his canteen of water but was unhurt. Send me any interesting papers and if you like to keep extracts from the papers of the doing of the 121st perhaps in future days if God will bless and preserve us for peace and happiness here on earth they may be pleasant to look over..
Citation: Alexander Biddle (1819-1899), autograph letter signed to Julia Williams Rush Biddle. 28 December 1862. Rush:IV:30:26
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