I've looked through the forums and was shocked to find that I couldn't really find any mention of the writings of Fr William Doyle, SJ on Vocations. I have found them to be a great help to me whilst I discern my Vocation and they were very influential in their time and amongst those that have read them still are. I provide links to his two most relevant writings below and hope they shall be of some use to those discerning a Vocation.
His tract 'Shall I be a Priest?' can be read here
His tract 'Vocations' can be read here
For those that don't know anything about Fr William Doyle, SJ I provide a quote from a CTS of Ireland tract '*The author, Fr William Doyle, is regarded by many as a saint. From 1908 to 1915, he gave no less than 152 missions and retreats. His fame as preacher, confessor and spiritual director spread wide and far, and he had "a special gift to hunt out the most hardened and neglected sinners and to bring them back with him to the church for confession." He was appointed during World War I chaplain of the 16th Irish Division. Having fulfilled his priestly duties in an outstanding fashion for almost two years, he was killed in the Battle of Ypres on 16 August 1917, having run “all day hither and thither over the battlefield like an angel of mercy.” This good shepherd truly gave his life for his shee*p'