Sir Samuel Morland (1625-1695) was the first English maker to venture into the field of calculating machines. This is a stylus driven adding machine of the type invented by Blaise Pascal which was used to add and subtract British currency.

Pocket instruments were often supplied with carry cases such as this leather case for Morlan's calculating machine. Originally it would have contained a stylus for operating the machine and possibly a small pamhlet explaining its use, neither of which have survived.