Following the death of John Senex in 1740 the business was continued by his widow Mary Senex and examples of this atlas are known with her imprint. Born Mary Wilcox she married Senex 27 August 1723 at St. Margaret’s, Westminster. She continued to run the business with some success for 15 years or so as sometime around 1755 material came into the hands of the Robert Sayer. This ‘Catalogue’ has been compared with one other we know which post-dates 1746. This example likely pre-dates that as it does not refer to her large scale map of the south east of England published in that year and referred to in a later Catalogue. The latest identified item in this Catalogue is the third edition of the ‘Actual Survey of all the Principal Roads of England and Wales’ dated to 1744. These broadside sheets were issued for distribution and as such have an appalling survival rate unless as is likely here it was pasted inside an atlas at some time. A fascinating record of a map publishers activities. Worms & Baynton-Williams (2011).