Whilst Giordano was employed at the Escurial two Doctors of Theology
were ordered to attend upon him, to answer his questions, and resolve
any doubts that might arise as to the orthodox manner of treating his
subjects. A courier was despatched every evening to Madrid, with a
letter from the prior to the King, rendering an account of the artist's
day's work; and within the present century, some of these letters were
preserved at the Escurial. On one occasion he wrote thus, "Sire, your
Giordano has painted this day about twelve figures, thrice as large as
life. To these he has added the powers and dominations, with proper
angels, cherubs, and seraphs, and clouds to support the same. The two
Doctors of Divinity have not answers ready for all his questions, and
their tongues are too slow too keep pace with the speed of his pencil."