I believe the Hull Asylum was De La Pole at Willerby, not sure what records exist. Yje Hull History Centre may be worth a try.
If it's Ferdinand Noel Buch you are wanting, he was buried at the Western Cemetery in Hull.Died 15 Feb 1911, Willerby AsylumBuried 17 FebAge 55, a ClerkCause of death ParalysisImage on FamilySearchhttps://www.familysearch.org/ark:/61903/3:1:3QS7-996P-XZZX?cat=702378Gives compartment/grave numbers with a note and a name (Olga Buch)