Technique and condition
In general the paint was applied painstakingly with a fine brush having minimum covering power except in the darks which are applied a little more thickly and in the lights which have significant impasto.
Compressed cracks in the lighter areas and cissing in the darks suggest an oil medium with added resin. No analysis has been carried out.
The varnish is a slightly discoloured glossy soft resin which was thinned and revarnished with a modern synthetic varnish in 1973.