"Flemish School" is by Hans Rottenhammer

Thiollet, from France, sells on 10 October 2017 a "Flemish School" Dancing putti, a small oil on copper (29 by 36 cm) estimated at 2000 to 3000 Euro.

The work is probably by Hans Rottenhammer, after a Jan Brueghel composition.

The Brueghel is from the Alte Pinakothek, and dates to ca. 1605.

Another versions by Rottenhammer can be found in the Museum of La Valletta, in Malta.

A nearly identical, though perhaps somewhat better painted version was sold at Christie's in 2009 for £31,000, indicating that the one for sale now is probably seriously undervalued and should fetch 10,000 Euro instead, although it needs some cleaning or restoration.(larger image found through RKD).

UPDATE: now for sale at Jean Moust for 7,000€ as by Rottenhammer, seems a very reasonable price.

"Circle of van Stalbemt" looks like a Studio of Joos de Momper werk

Thiollet, from Argenteuil, France, sells on 15 December 2015 a "Flemish School, ca. 1630, circle of Adriaen van Stalbemt" Procession scene, without an estimate. UPDATE: it has since been estimated at 2,000 to 3,000 Euro.

While Adriaen van Stalbemt (1580-1662) has painted a few cave scenes, I would locate this work in the studio of Joos de Momper II (1564-1635), one of the most productive Flemish painters of the period. Stalbemt usually painted nymphs bathing or similar mythological scenes, while De Momper often depicted religious scenes in his cave paintings.

Works similar to the one for sale can be found quite frequently. Christie's sold in 2011 the above comparable scene for £3,750.

A very similar grotto and view, but in a different scene, can be seen in the above landscape by De Momper, from the Rheinisches Landesmuseum in Bonn.

The Liechtenstein Museum has a comparable scene by De Momper and Jan Brueghel I, of (obviously) higher quality.

The Hermit's Cave from the Louvre has, apart from other similarities, a gate on the left that closely resembles the one in the work for sale.

Despite some damage to the painting, and looking at comparable works sold over the last few years, this one should be worth 5,000 to 8,000 Euro.