Attributed to Andries Cornelis Lens

Both canvases have firm relinings. There is a degree of surface dirt on both pictures, although the overall condition is good. Both pictures are somewhat lighter than the catalogue images suggest. Inspection under ultra violet light reveals and a thick and slightly discoloured varnish, which fluoresces opaque under ultra violet light. Also revealed are some scattered, localised retouchings on both pictures. Inspection of the Sea Nymphs canvas under ultra violet light reveals five small, restored, old damages. Four of which are in the top left quarter of the picture in the background. The fifth area of restored damage is visible in the shoulder of the right hand nymph. There are some older strengthenings visible in the darker tones beneath the varnish on both canvases. Inspection of Perseus with Minerva discovering the sleeping Medusa under ultra violet light reveals an area of old restored damage measuring 2 by 2 inches, near the left hand margin in the background foliage. For all sales which take place on or after 1 February 2015, please note that the rate of buyer's premium for each lot (charged as a percentage of the hammer price achieved for that lot) has been revised and shall be calculated at the thresholds set out below: Buyer's premium is 25% of the hammer price up to and including £100,000; Buyer's premium is 20% of the hammer price on any amount in excess of £100, 000 up to and including £1,800,000; Buyer's premium is 12% of the hammer price on any amount in excess of £1,800,000. As stated above, the revised thresholds are effective as of 1 February 2015.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."