Question: What is a sub-group of Indigenous peoples of the Pacific Northwest Coast in which David A. Boxley identifies with?

Context paragraphs:
John R. Jewitt: John Rodgers Jewitt (21 May 1783 – 7 January 1821) was an English armourer who entered the historical record with his memoirs about the 28 months he spent as a captive of Maquinna of the Nuu-chah-nulth (Nootka) people on the Pacific Northwest Coast of what is now Canada.  The "Canadian Encyclopedia" describes Jewitt as a shrewd observer and his "Narrative" as a "classic of captivity literature".  The memoir, according to the "Dictionary of Canadian Biography", is a major source of information about the indigenous peoples of the Pacific Northwest Coast.

Indigenous peoples of the Pacific Northwest Coast: The indigenous peoples of the Pacific Northwest Coast are composed of many nations and tribal affiliations, each with distinctive cultural and political identities, but they share certain beliefs, traditions and practices, such as the centrality of salmon as a resource and spiritual symbol.  The term "Northwest Coast" or "North West Coast" is used in anthropology to refer to the groups of Indigenous people residing along the coast of British Columbia, Washington state, parts of Alaska, Oregon, and northern California.  The term "Pacific Northwest" is largely used in the American context.

Kutkh: Kutkh (also "Kutkha", "Kootkha", "Kutq" "Kutcha" and other variants, Russian: Кутх ), is a Raven spirit traditionally revered in various forms by various indigenous peoples of the Russian Far East.  Kutkh appears in many legends: as a key figure in creation, as a fertile ancestor of mankind, as a mighty shaman and as a trickster.  He is a popular subject of the animist stories of the Chukchi people and plays a central role in the mythology of the Koryaks and Itelmens of Kamchatka.  Many of the stories regarding Kutkh are similar to those of the Raven among the indigenous peoples of the Pacific Northwest Coast, suggesting a long history of indirect cultural contact between Asian and North American peoples.

Quinault Indian Nation: The Quinault Indian Nation ( or ; QIN), formerly known as the Quinault Tribe of the Quinault Reservation, is a federally recognized tribe of Quinault, Queets, Quileute, Hoh, Chehalis, Chinook, and Cowlitz peoples.  They are a Southwestern Coast Salish people of indigenous peoples of the Pacific Northwest Coast.  Their tribe is located in Washington state on the Pacific coast of the Olympic Peninsula.  These peoples are also represented in other tribes in Washington and Oregon.

Slahal: Slahal (or Lahal) is a gambling game of the indigenous peoples of the Pacific Northwest Coast, also known as stickgame, bonegame, bloodless war game, handgame, or a name specific to each language.  It is played throughout the western United States and Canada by indigenous peoples.  Traditionally, the game uses the shin bones from the foreleg of a deer or other animal.  The name of the game is a Chinook Jargon word.

Coast Salish art: Coast Salish art is an art unique to the Pacific Northwest Coast among the Coast Salish peoples.  Coast Salish are peoples from the Pacific Northwest Coast made up of many different languages and cultural characteristics.  Coast Salish territory covers the coast of British Columbia and Washington state.  Within traditional Coast Salish art there are two major forms; the flat design and carving, and basketry and weaving.  In historical times these were delineated among male and female roles in the community with men made "figurative pieces, such as sculptures and paintings that depicts crest, shamanic beings, and spirits, whereas women produced baskets and textiles, most often decorated with abstract designs."

David A. Boxley: David Albert Boxley (born 1952) is an American artist from the Tsimshian, an indigenous people in southeast Alaska.  He is best known for carving totem poles.

Totem pole: Totem poles are monumental carvings, a type of Northwest Coast art, consisting of poles, posts or pillars, carved with symbols or figures.  They are usually made from large trees, mostly western red cedar, by indigenous peoples of the Pacific Northwest coast of North America (Washington, Oregon, and Canada's western province, British Columbia).  The word "totem" derives from the Algonquian (most likely Ojibwe) word "odoodem" [oˈtuːtɛm ], "(his) kinship group".  The carvings may symbolize or commemorate cultural beliefs that recount familiar legends, clan lineages, or notable events.  The poles may also serve as functional architectural features, welcome signs for village visitors, mortuary vessels for the remains of deceased ancestors, or as a means to publicly ridicule someone.  They may embody a historical narrative of significance to the people carving and installing the pole.  Given the complexity and symbolic meanings of totem pole carvings, their placement and importance lies in the observer's knowledge and connection to the meanings of the figures and the culture in which they are embedded.

Potlatch: A potlatch is a gift-giving feast practiced by indigenous peoples of the Pacific Northwest Coast of Canada and the United States, among whom it is traditionally the primary economic system.  This includes the Heiltsuk, Haida, Nuxalk, Tlingit, Makah, Tsimshian, Nuu-chah-nulth, Kwakwaka'wakw, and Coast Salish cultures.  Potlatches are also a common feature of the peoples of the Interior and of the Subarctic adjoining the Northwest Coast, though mostly without the elaborate ritual and gift-giving economy of the coastal peoples (see Athabaskan potlatch).

Maritime fur trade: The maritime fur trade was a ship-based fur trade system that focused on acquiring furs of sea otters and other animals from the indigenous peoples of the Pacific Northwest Coast and natives of Alaska.  The furs were mostly sold in China in exchange for tea, silks, porcelain, and other Chinese goods, which were then sold in Europe and the United States.  The maritime fur trade was pioneered by Russians, working east from Kamchatka along the Aleutian Islands to the southern coast of Alaska.  British and Americans entered during the 1780s, focusing on what is now the coast of British Columbia.  The trade boomed around the beginning of the 19th century.  A long period of decline began in the 1810s.  As the sea otter population was depleted, the maritime fur trade diversified and transformed, tapping new markets and commodities, while continuing to focus on the Northwest Coast and China.  It lasted until the middle to late 19th century.  Russians controlled most of the coast of what is now Alaska during the entire era.  The coast south of Alaska endured fierce competition between, and among, British and American trading vessels.  The British were the first to operate in the southern sector, but were unable to compete against the Americans, who dominated from the 1790s to the 1830s.  The British Hudson's Bay Company entered the coast trade in the 1820s with the intention of driving the Americans away.  This was accomplished by about 1840.  In its late period, the maritime fur trade was largely conducted by the British Hudson's Bay Company and the Russian-American Company.

Supporting paragraphs: David A. Boxley Indigenous peoples of the Pacific Northwest Coast
Answer: Tsimshian