If a trustee dies pending the proceedings against him, his executor or administrator may be summoned in as a party, and he shall be liable as if the action had been brought against him as trustee.
N.H. Rev. Stat. Ann. § 512:4
Death of Trustee
Source
Official source: New Hampshire General Court. Reproduced from public-domain New Hampshire statutes; confirm against the official source for the current text. Not legal advice.