In his excellent and highly readable new biography of Jamgön Kongtrul Lodrö Thaye (‘jam mgon kong sprul blo gros mtha’ yas, 1813–1899), Alexander Gardner states (p.275) that Kongtrul never met Dza Patrul Rinpoche (rdza dpal sprul, 1808–1887). For this, he relies on the following statement from Joshua Schapiro’s thesis:

“There is, to my knowledge, however, no evidence in the biographical archive that Patrul had a relationship with Kongtrul […]. Kongtrul does not appear in Patrul’s biographie...