Lincoln's embalmment

[loetar44]

From a Dodge Chemical Co. publication entitled “New Light on the Embalming of President Lincoln” by Seabury Quinn (1910 ?): “In collaboration with Frank T. Sands, "undertaker", the Messrs. M. E. & J. W. Harvey, (also undertakers"), were busy designing and making a coffin while Harry P. Cattell was engaged in his professional work”

Cattell was Lincoln’s actual embalmer. The embalment took place at / after noon April 15, 1865 immediately after the cranial autopsy. Now I wonder, when was Lincoln’s coffin ready? I suspect that there was some time needed to make the coffin and it make sense to me that the coffin was not earlier ready than April 16 or April 17. In the evening of April 17 Lincon’s coffin was placed in the East Room.

Does someone know when the coffin was ready? And where was the body of Lincoln between embalment and coffin? I suspect in the Prince of Wales Room ?