Mary and horses

[STS Lincolnite]

Has anyone every seen any documentation of Mary's response to the death of the horses in the February 1864 stable fire?

From what I remember, a pony formerly belonging to Willie and a pony that belonged to Tad were killed along with 2 of Lincoln's horses and 2 of John Nicolay's horses. Lincoln had to be pulled away from the fire while trying to save the pony that had belonged to Willie. I think there was also a report of him being seen weeping after the incident.