By 1851, there were 15 asteroids, all but one with their own symbol. The symbols were becoming less and less simple, and, as they had to be drawn by hand, astronomers found some of them hard to draw. This difficulty was addressed by Benjamin Apthorp Gould in 1851, who suggested numbering asteroids in the order that they were found, and placing this number in a circle as the symbol for the asteroid, such as ④ for the fourth asteroid, Vesta. This practice was soon coupled with the name itself into an official number-name designation, "④ Vesta", as the number of minor planets increased. By "ca" 1858, the circle had been simplified to brackets, "(4)" and "(4) Vesta", which was easier to typeset. Other punctuation such as "4) Vesta" and "4, Vesta" was also used, but had more or less completely died out by 1949.