 Complete the following phrase:  On 25 January 2011, during the University of Basel Kings Valley Projects 2011 excavation season, work to install a protective iron cover over the shaft of KV40 uncovered the edges of a shaft cut into the rock north of KV40. Given the small size of the cutting, approximately , and its proximity to the neighbouring tomb, it was initially suggested to be a possible embalming cache or an unfinished shaft. The feature was given the initial designation of KV40b. Due to its discovery coinciding with the beginning of the 